diff --git a/packages/react-native-renderer/src/ReactFabricHostConfig.js b/packages/react-native-renderer/src/ReactFabricHostConfig.js
index 0f4a59c77f6f..5494f4152a47 100644
--- a/packages/react-native-renderer/src/ReactFabricHostConfig.js
+++ b/packages/react-native-renderer/src/ReactFabricHostConfig.js
@@ -8,10 +8,6 @@
  */
 
 import type {TouchedViewDataAtPoint, ViewConfig} from './ReactNativeTypes';
-import {
-  createPublicInstance,
-  type ReactFabricHostComponent,
-} from './ReactFabricPublicInstance';
 import {create, diff} from './ReactNativeAttributePayload';
 import {dispatchEvent} from './ReactFabricEventEmitter';
 import {
@@ -23,6 +19,8 @@ import {
 import {
   ReactNativeViewConfigRegistry,
   deepFreezeAndThrowOnMutationInDev,
+  createPublicInstance,
+  type PublicInstance as ReactNativePublicInstance,
 } from 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface';
 
 const {
@@ -62,12 +60,12 @@ export type Instance = {
     // Reference to the React handle (the fiber)
     internalInstanceHandle: Object,
     // Exposed through refs.
-    publicInstance: ReactFabricHostComponent,
+    publicInstance: PublicInstance,
   },
 };
 export type TextInstance = {node: Node, ...};
 export type HydratableInstance = Instance | TextInstance;
-export type PublicInstance = ReactFabricHostComponent;
+export type PublicInstance = ReactNativePublicInstance;
 export type Container = number;
 export type ChildSet = Object;
 export type HostContext = $ReadOnly<{
diff --git a/packages/react-native-renderer/src/ReactFabricPublicInstance.js b/packages/react-native-renderer/src/ReactFabricPublicInstance.js
deleted file mode 100644
index 282e5af7cde1..000000000000
--- a/packages/react-native-renderer/src/ReactFabricPublicInstance.js
+++ /dev/null
@@ -1,153 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow strict-local
- */
-
-import type {ElementRef} from 'react';
-import type {
-  ViewConfig,
-  INativeMethods,
-  HostComponent,
-  MeasureInWindowOnSuccessCallback,
-  MeasureLayoutOnSuccessCallback,
-  MeasureOnSuccessCallback,
-} from './ReactNativeTypes';
-
-import {TextInputState} from 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface';
-import {create} from './ReactNativeAttributePayload';
-import {warnForStyleProps} from './NativeMethodsMixinUtils';
-import {getNodeFromInternalInstanceHandle} from './ReactNativePublicCompat';
-
-const {
-  measure: fabricMeasure,
-  measureInWindow: fabricMeasureInWindow,
-  measureLayout: fabricMeasureLayout,
-  setNativeProps,
-  getBoundingClientRect: fabricGetBoundingClientRect,
-} = nativeFabricUIManager;
-
-const noop = () => {};
-
-/**
- * This is used for refs on host components.
- */
-export class ReactFabricHostComponent implements INativeMethods {
-  // These need to be accessible from `ReactFabricPublicInstanceUtils`.
-  __nativeTag: number;
-  __internalInstanceHandle: mixed;
-
-  _viewConfig: ViewConfig;
-
-  constructor(
-    tag: number,
-    viewConfig: ViewConfig,
-    internalInstanceHandle: mixed,
-  ) {
-    this.__nativeTag = tag;
-    this._viewConfig = viewConfig;
-    this.__internalInstanceHandle = internalInstanceHandle;
-  }
-
-  blur() {
-    TextInputState.blurTextInput(this);
-  }
-
-  focus() {
-    TextInputState.focusTextInput(this);
-  }
-
-  measure(callback: MeasureOnSuccessCallback) {
-    const node = getNodeFromInternalInstanceHandle(
-      this.__internalInstanceHandle,
-    );
-    if (node != null) {
-      fabricMeasure(node, callback);
-    }
-  }
-
-  measureInWindow(callback: MeasureInWindowOnSuccessCallback) {
-    const node = getNodeFromInternalInstanceHandle(
-      this.__internalInstanceHandle,
-    );
-    if (node != null) {
-      fabricMeasureInWindow(node, callback);
-    }
-  }
-
-  measureLayout(
-    relativeToNativeNode: number | ElementRef<HostComponent<mixed>>,
-    onSuccess: MeasureLayoutOnSuccessCallback,
-    onFail?: () => void /* currently unused */,
-  ) {
-    if (
-      typeof relativeToNativeNode === 'number' ||
-      !(relativeToNativeNode instanceof ReactFabricHostComponent)
-    ) {
-      if (__DEV__) {
-        console.error(
-          'Warning: ref.measureLayout must be called with a ref to a native component.',
-        );
-      }
-
-      return;
-    }
-
-    const toStateNode = getNodeFromInternalInstanceHandle(
-      this.__internalInstanceHandle,
-    );
-    const fromStateNode = getNodeFromInternalInstanceHandle(
-      relativeToNativeNode.__internalInstanceHandle,
-    );
-
-    if (toStateNode != null && fromStateNode != null) {
-      fabricMeasureLayout(
-        toStateNode,
-        fromStateNode,
-        onFail != null ? onFail : noop,
-        onSuccess != null ? onSuccess : noop,
-      );
-    }
-  }
-
-  unstable_getBoundingClientRect(): DOMRect {
-    const node = getNodeFromInternalInstanceHandle(
-      this.__internalInstanceHandle,
-    );
-    if (node != null) {
-      const rect = fabricGetBoundingClientRect(node);
-
-      if (rect) {
-        return new DOMRect(rect[0], rect[1], rect[2], rect[3]);
-      }
-    }
-
-    // Empty rect if any of the above failed
-    return new DOMRect(0, 0, 0, 0);
-  }
-
-  setNativeProps(nativeProps: {...}): void {
-    if (__DEV__) {
-      warnForStyleProps(nativeProps, this._viewConfig.validAttributes);
-    }
-    const updatePayload = create(nativeProps, this._viewConfig.validAttributes);
-
-    const node = getNodeFromInternalInstanceHandle(
-      this.__internalInstanceHandle,
-    );
-    if (node != null && updatePayload != null) {
-      setNativeProps(node, updatePayload);
-    }
-  }
-}
-
-export function createPublicInstance(
-  tag: number,
-  viewConfig: ViewConfig,
-  internalInstanceHandle: mixed,
-): ReactFabricHostComponent {
-  return new ReactFabricHostComponent(tag, viewConfig, internalInstanceHandle);
-}
diff --git a/packages/react-native-renderer/src/ReactFabricPublicInstanceUtils.js b/packages/react-native-renderer/src/ReactFabricPublicInstanceUtils.js
deleted file mode 100644
index 203f96589fb7..000000000000
--- a/packages/react-native-renderer/src/ReactFabricPublicInstanceUtils.js
+++ /dev/null
@@ -1,36 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow strict-local
- */
-
-import type {ReactFabricHostComponent} from './ReactFabricPublicInstance';
-import {getNodeFromInternalInstanceHandle} from './ReactNativePublicCompat';
-
-/**
- * IMPORTANT: This module is used in Paper and Fabric. It needs to be defined
- * outside of `ReactFabricPublicInstance` because that module requires
- * `nativeFabricUIManager` to be defined in the global scope (which does not
- * happen in Paper).
- */
-
-export function getNativeTagFromPublicInstance(
-  publicInstance: ReactFabricHostComponent,
-): number {
-  return publicInstance.__nativeTag;
-}
-
-export function getNodeFromPublicInstance(
-  publicInstance: ReactFabricHostComponent,
-): mixed {
-  if (publicInstance.__internalInstanceHandle == null) {
-    return null;
-  }
-
-  return getNodeFromInternalInstanceHandle(
-    publicInstance.__internalInstanceHandle,
-  );
-}
diff --git a/packages/react-native-renderer/src/ReactNativeFiberInspector.js b/packages/react-native-renderer/src/ReactNativeFiberInspector.js
index 38a3855ea92a..d1884c44eafc 100644
--- a/packages/react-native-renderer/src/ReactNativeFiberInspector.js
+++ b/packages/react-native-renderer/src/ReactNativeFiberInspector.js
@@ -17,10 +17,12 @@ import {
 import getComponentNameFromType from 'shared/getComponentNameFromType';
 import {HostComponent} from 'react-reconciler/src/ReactWorkTags';
 // Module provided by RN:
-import {UIManager} from 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface';
+import {
+  UIManager,
+  getNodeFromPublicInstance,
+} from 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface';
 import {enableGetInspectorDataForInstanceInProduction} from 'shared/ReactFeatureFlags';
 import {getClosestInstanceFromNode} from './ReactNativeComponentTree';
-import {getNodeFromPublicInstance} from './ReactFabricPublicInstanceUtils';
 import {getNodeFromInternalInstanceHandle} from './ReactNativePublicCompat';
 
 const emptyObject = {};
diff --git a/packages/react-native-renderer/src/ReactNativePublicCompat.js b/packages/react-native-renderer/src/ReactNativePublicCompat.js
index 569397b4e834..4a8452ad3550 100644
--- a/packages/react-native-renderer/src/ReactNativePublicCompat.js
+++ b/packages/react-native-renderer/src/ReactNativePublicCompat.js
@@ -14,6 +14,8 @@ import type {ElementRef, ElementType} from 'react';
 import {
   UIManager,
   legacySendAccessibilityEvent,
+  getNodeFromPublicInstance,
+  getNativeTagFromPublicInstance,
 } from 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface';
 
 import {
@@ -23,11 +25,6 @@ import {
 import ReactSharedInternals from 'shared/ReactSharedInternals';
 import getComponentNameFromType from 'shared/getComponentNameFromType';
 
-import {
-  getNodeFromPublicInstance,
-  getNativeTagFromPublicInstance,
-} from './ReactFabricPublicInstanceUtils';
-
 const ReactCurrentOwner = ReactSharedInternals.ReactCurrentOwner;
 
 export function findHostInstance_DEPRECATED<TElementType: ElementType>(
@@ -83,6 +80,7 @@ export function findHostInstance_DEPRECATED<TElementType: ElementType>(
 
   // findHostInstance handles legacy vs. Fabric differences correctly
   // $FlowFixMe[incompatible-exact] we need to fix the definition of `HostComponent` to use NativeMethods as an interface, not as a type.
+  // $FlowFixMe[incompatible-return]
   return hostInstance;
 }
 
@@ -147,9 +145,8 @@ export function findNodeHandle(componentOrHandle: any): ?number {
     return hostInstance;
   }
 
-  // $FlowFixMe[prop-missing] For compatibility with legacy renderer instances
+  // $FlowFixMe[incompatible-type] For compatibility with legacy renderer instances
   if (hostInstance._nativeTag != null) {
-    // $FlowFixMe[incompatible-return]
     return hostInstance._nativeTag;
   }
 
diff --git a/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/ReactNativePrivateInterface.js b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/ReactNativePrivateInterface.js
index befc3bb617f4..03b89b3e711f 100644
--- a/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/ReactNativePrivateInterface.js
+++ b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/ReactNativePrivateInterface.js
@@ -7,6 +7,8 @@
  * @flow strict-local
  */
 
+export opaque type PublicInstance = mixed;
+
 module.exports = {
   get BatchedBridge() {
     return require('./BatchedBridge.js');
@@ -44,4 +46,13 @@ module.exports = {
   get RawEventEmitter() {
     return require('./RawEventEmitter').default;
   },
+  get getNativeTagFromPublicInstance() {
+    return require('./getNativeTagFromPublicInstance').default;
+  },
+  get getNodeFromPublicInstance() {
+    return require('./getNodeFromPublicInstance').default;
+  },
+  get createPublicInstance() {
+    return require('./createPublicInstance').default;
+  },
 };
diff --git a/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/createPublicInstance.js b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/createPublicInstance.js
new file mode 100644
index 000000000000..4f16c9d9ff10
--- /dev/null
+++ b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/createPublicInstance.js
@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ */
+
+import type {PublicInstance} from './ReactNativePrivateInterface';
+
+export default function createPublicInstance(
+  tag: number,
+  viewConfig: mixed,
+  internalInstanceHandle: mixed,
+): PublicInstance {
+  return {
+    __nativeTag: tag,
+    __internalInstanceHandle: internalInstanceHandle,
+  };
+}
diff --git a/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/getNativeTagFromPublicInstance.js b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/getNativeTagFromPublicInstance.js
new file mode 100644
index 000000000000..b6862281494c
--- /dev/null
+++ b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/getNativeTagFromPublicInstance.js
@@ -0,0 +1,16 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ */
+
+import type {PublicInstance} from './ReactNativePrivateInterface';
+
+export default function getNativeTagFromPublicInstance(
+  publicInstance: PublicInstance,
+) {
+  return publicInstance.__nativeTag;
+}
diff --git a/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/getNodeFromPublicInstance.js b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/getNodeFromPublicInstance.js
new file mode 100644
index 000000000000..b592968462ed
--- /dev/null
+++ b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/getNodeFromPublicInstance.js
@@ -0,0 +1,20 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ */
+
+import type {PublicInstance} from './ReactNativePrivateInterface';
+
+import {getNodeFromInternalInstanceHandle} from '../../../../ReactNativePublicCompat';
+
+export default function getNodeFromPublicInstance(
+  publicInstance: PublicInstance,
+) {
+  return getNodeFromInternalInstanceHandle(
+    publicInstance.__internalInstanceHandle,
+  );
+}
diff --git a/packages/react-native-renderer/src/__tests__/ReactFabric-test.internal.js b/packages/react-native-renderer/src/__tests__/ReactFabric-test.internal.js
index 72377b7d12cc..cdc8882a0855 100644
--- a/packages/react-native-renderer/src/__tests__/ReactFabric-test.internal.js
+++ b/packages/react-native-renderer/src/__tests__/ReactFabric-test.internal.js
@@ -43,9 +43,9 @@ describe('ReactFabric', () => {
       require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface')
         .ReactNativeViewConfigRegistry.register;
     getNativeTagFromPublicInstance =
-      require('../ReactFabricPublicInstanceUtils').getNativeTagFromPublicInstance;
+      require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface').getNativeTagFromPublicInstance;
     getNodeFromPublicInstance =
-      require('../ReactFabricPublicInstanceUtils').getNodeFromPublicInstance;
+      require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface').getNodeFromPublicInstance;
 
     act = require('internal-test-utils').act;
   });
diff --git a/packages/react-native-renderer/src/__tests__/ReactFabricAndNative-test.internal.js b/packages/react-native-renderer/src/__tests__/ReactFabricAndNative-test.internal.js
index fca6d00c7277..4e0fcad9c80c 100644
--- a/packages/react-native-renderer/src/__tests__/ReactFabricAndNative-test.internal.js
+++ b/packages/react-native-renderer/src/__tests__/ReactFabricAndNative-test.internal.js
@@ -37,7 +37,7 @@ describe('created with ReactFabric called with ReactNative', () => {
       require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface')
         .ReactNativeViewConfigRegistry.register;
     getNativeTagFromPublicInstance =
-      require('../ReactFabricPublicInstanceUtils').getNativeTagFromPublicInstance;
+      require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface').getNativeTagFromPublicInstance;
   });
 
   it('find Fabric instances with the RN renderer', () => {
diff --git a/packages/react-native-renderer/src/__tests__/ReactFabricHostComponent-test.internal.js b/packages/react-native-renderer/src/__tests__/ReactFabricHostComponent-test.internal.js
deleted file mode 100644
index ceab02d8497b..000000000000
--- a/packages/react-native-renderer/src/__tests__/ReactFabricHostComponent-test.internal.js
+++ /dev/null
@@ -1,248 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * @emails react-core
- * @jest-environment node
- */
-
-'use strict';
-
-import * as React from 'react';
-
-beforeEach(() => {
-  jest.resetModules();
-  jest.restoreAllMocks();
-
-  require('react-native/Libraries/ReactPrivate/InitializeNativeFabricUIManager');
-});
-
-/**
- * Renders a sequence of mock views as dictated by `keyLists`. The `keyLists`
- * argument is an array of arrays which determines the number of render passes,
- * how many views will be rendered in each pass, and what the keys are for each
- * of the views.
- *
- * If an element in `keyLists` is null, the entire root will be unmounted.
- *
- * The return value is an array of arrays with the resulting refs from rendering
- * each corresponding array of keys.
- *
- * If the corresponding array of keys is null, the returned element at that
- * index will also be null.
- */
-async function mockRenderKeys(keyLists) {
-  const ReactFabric = require('react-native-renderer/fabric');
-  const createReactNativeComponentClass =
-    require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface')
-      .ReactNativeViewConfigRegistry.register;
-  const act = require('internal-test-utils').act;
-
-  const mockContainerTag = 11;
-  const MockView = createReactNativeComponentClass('RCTMockView', () => ({
-    validAttributes: {foo: true},
-    uiViewClassName: 'RCTMockView',
-  }));
-
-  const result = [];
-  for (let i = 0; i < keyLists.length; i++) {
-    const keyList = keyLists[i];
-    if (Array.isArray(keyList)) {
-      const refs = keyList.map(key => undefined);
-      await act(() => {
-        ReactFabric.render(
-          <MockView>
-            {keyList.map((key, index) => (
-              <MockView
-                key={key}
-                ref={ref => {
-                  refs[index] = ref;
-                }}
-              />
-            ))}
-          </MockView>,
-          mockContainerTag,
-        );
-      });
-      // Clone `refs` to ignore future passes.
-      result.push([...refs]);
-      continue;
-    }
-    if (keyList == null) {
-      await act(() => {
-        ReactFabric.stopSurface(mockContainerTag);
-      });
-      result.push(null);
-      continue;
-    }
-    throw new TypeError(
-      `Invalid 'keyLists' element of type ${typeof keyList}.`,
-    );
-  }
-
-  return result;
-}
-
-describe('blur', () => {
-  test('blur() invokes TextInputState', async () => {
-    const {
-      TextInputState,
-    } = require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface');
-
-    const [[fooRef]] = await mockRenderKeys([['foo']]);
-
-    fooRef.blur();
-
-    expect(TextInputState.blurTextInput.mock.calls).toEqual([[fooRef]]);
-  });
-});
-
-describe('focus', () => {
-  test('focus() invokes TextInputState', async () => {
-    const {
-      TextInputState,
-    } = require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface');
-
-    const [[fooRef]] = await mockRenderKeys([['foo']]);
-
-    fooRef.focus();
-
-    expect(TextInputState.focusTextInput.mock.calls).toEqual([[fooRef]]);
-  });
-});
-
-describe('measure', () => {
-  test('component.measure(...) invokes callback', async () => {
-    const [[fooRef]] = await mockRenderKeys([['foo']]);
-
-    const callback = jest.fn();
-    fooRef.measure(callback);
-
-    expect(nativeFabricUIManager.measure).toHaveBeenCalledTimes(1);
-    expect(callback.mock.calls).toEqual([[10, 10, 100, 100, 0, 0]]);
-  });
-
-  test('unmounted.measure(...) does nothing', async () => {
-    const [[fooRef]] = await mockRenderKeys([['foo'], null]);
-
-    const callback = jest.fn();
-    fooRef.measure(callback);
-
-    expect(nativeFabricUIManager.measure).not.toHaveBeenCalled();
-    expect(callback).not.toHaveBeenCalled();
-  });
-});
-
-describe('measureInWindow', () => {
-  test('component.measureInWindow(...) invokes callback', async () => {
-    const [[fooRef]] = await mockRenderKeys([['foo']]);
-
-    const callback = jest.fn();
-    fooRef.measureInWindow(callback);
-
-    expect(nativeFabricUIManager.measureInWindow).toHaveBeenCalledTimes(1);
-    expect(callback.mock.calls).toEqual([[10, 10, 100, 100]]);
-  });
-
-  test('unmounted.measureInWindow(...) does nothing', async () => {
-    const [[fooRef]] = await mockRenderKeys([['foo'], null]);
-
-    const callback = jest.fn();
-    fooRef.measureInWindow(callback);
-
-    expect(nativeFabricUIManager.measureInWindow).not.toHaveBeenCalled();
-    expect(callback).not.toHaveBeenCalled();
-  });
-});
-
-describe('measureLayout', () => {
-  test('component.measureLayout(component, ...) invokes callback', async () => {
-    const [[fooRef, barRef]] = await mockRenderKeys([['foo', 'bar']]);
-
-    const successCallback = jest.fn();
-    const failureCallback = jest.fn();
-    fooRef.measureLayout(barRef, successCallback, failureCallback);
-
-    expect(nativeFabricUIManager.measureLayout).toHaveBeenCalledTimes(1);
-    expect(successCallback.mock.calls).toEqual([[1, 1, 100, 100]]);
-  });
-
-  test('unmounted.measureLayout(component, ...) does nothing', async () => {
-    const [[fooRef, barRef]] = await mockRenderKeys([
-      ['foo', 'bar'],
-      ['foo', null],
-    ]);
-
-    const successCallback = jest.fn();
-    const failureCallback = jest.fn();
-    fooRef.measureLayout(barRef, successCallback, failureCallback);
-
-    expect(nativeFabricUIManager.measureLayout).not.toHaveBeenCalled();
-    expect(successCallback).not.toHaveBeenCalled();
-  });
-
-  test('component.measureLayout(unmounted, ...) does nothing', async () => {
-    const [[fooRef, barRef]] = await mockRenderKeys([
-      ['foo', 'bar'],
-      [null, 'bar'],
-    ]);
-
-    const successCallback = jest.fn();
-    const failureCallback = jest.fn();
-    fooRef.measureLayout(barRef, successCallback, failureCallback);
-
-    expect(nativeFabricUIManager.measureLayout).not.toHaveBeenCalled();
-    expect(successCallback).not.toHaveBeenCalled();
-  });
-
-  test('unmounted.measureLayout(unmounted, ...) does nothing', async () => {
-    const [[fooRef, barRef]] = await mockRenderKeys([['foo', 'bar'], null]);
-
-    const successCallback = jest.fn();
-    const failureCallback = jest.fn();
-    fooRef.measureLayout(barRef, successCallback, failureCallback);
-
-    expect(nativeFabricUIManager.measureLayout).not.toHaveBeenCalled();
-    expect(successCallback).not.toHaveBeenCalled();
-  });
-});
-
-describe('unstable_getBoundingClientRect', () => {
-  test('component.unstable_getBoundingClientRect() returns DOMRect', async () => {
-    const [[fooRef]] = await mockRenderKeys([['foo']]);
-
-    const rect = fooRef.unstable_getBoundingClientRect();
-
-    expect(nativeFabricUIManager.getBoundingClientRect).toHaveBeenCalledTimes(
-      1,
-    );
-    expect(rect.toJSON()).toMatchObject({
-      x: 10,
-      y: 10,
-      width: 100,
-      height: 100,
-    });
-  });
-
-  test('unmounted.unstable_getBoundingClientRect() returns empty DOMRect', async () => {
-    const [[fooRef]] = await mockRenderKeys([['foo'], null]);
-
-    const rect = fooRef.unstable_getBoundingClientRect();
-
-    expect(nativeFabricUIManager.getBoundingClientRect).not.toHaveBeenCalled();
-    expect(rect.toJSON()).toMatchObject({x: 0, y: 0, width: 0, height: 0});
-  });
-});
-
-describe('setNativeProps', () => {
-  test('setNativeProps(...) invokes setNativeProps on Fabric UIManager', async () => {
-    const {
-      UIManager,
-    } = require('react-native/Libraries/ReactPrivate/ReactNativePrivateInterface');
-
-    const [[fooRef]] = await mockRenderKeys([['foo']]);
-    fooRef.setNativeProps({foo: 'baz'});
-
-    expect(UIManager.updateView).not.toBeCalled();
-    expect(nativeFabricUIManager.setNativeProps).toHaveBeenCalledTimes(1);
-  });
-});
diff --git a/scripts/flow/react-native-host-hooks.js b/scripts/flow/react-native-host-hooks.js
index 7cb3e389126c..d3f5d3b7b50c 100644
--- a/scripts/flow/react-native-host-hooks.js
+++ b/scripts/flow/react-native-host-hooks.js
@@ -16,6 +16,7 @@ type __MeasureInWindowOnSuccessCallback = any;
 type __MeasureLayoutOnSuccessCallback = any;
 type __ReactNativeBaseComponentViewConfig = any;
 type __ViewConfigGetter = any;
+type __ViewConfig = any;
 
 // libdefs cannot actually import. This is supposed to be the type imported
 // from 'react-native-renderer/src/legacy-events/TopLevelEventTypes';
@@ -143,6 +144,18 @@ declare module 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface'
     emit: (channel: string, event: RawEventEmitterEvent) => string,
     ...
   };
+  declare export opaque type PublicInstance;
+  declare export function getNodeFromPublicInstance(
+    publicInstance: PublicInstance,
+  ): Object;
+  declare export function getNativeTagFromPublicInstance(
+    publicInstance: PublicInstance,
+  ): number;
+  declare export function createPublicInstance(
+    tag: number,
+    viewConfig: __ViewConfig,
+    internalInstanceHandle: mixed,
+  ): PublicInstance;
 }
 
 declare module 'react-native/Libraries/ReactPrivate/ReactNativePrivateInitializeCore' {