diff --git a/.generator/schemas/v2/openapi.yaml b/.generator/schemas/v2/openapi.yaml
index 71b4528bc8db..5c692d070138 100644
--- a/.generator/schemas/v2/openapi.yaml
+++ b/.generator/schemas/v2/openapi.yaml
@@ -34514,7 +34514,6 @@ components:
       - id
       - type
       - inputs
-      - auth
       - customer_id
       type: object
     ObservabilityPipelineGoogleChronicleDestinationEncoding:
@@ -34580,9 +34579,7 @@ components:
       - type
       - inputs
       - bucket
-      - auth
       - storage_class
-      - acl
       type: object
     ObservabilityPipelineGoogleCloudStorageDestinationAcl:
       description: Access control list setting for objects written to the bucket.
@@ -34713,7 +34710,6 @@ components:
       required:
       - id
       - type
-      - auth
       - decoding
       - project
       - subscription
diff --git a/services/observability_pipelines/src/v2/models/ObservabilityPipelineGoogleChronicleDestination.ts b/services/observability_pipelines/src/v2/models/ObservabilityPipelineGoogleChronicleDestination.ts
index 64cafc002335..bf0f8c696fb1 100644
--- a/services/observability_pipelines/src/v2/models/ObservabilityPipelineGoogleChronicleDestination.ts
+++ b/services/observability_pipelines/src/v2/models/ObservabilityPipelineGoogleChronicleDestination.ts
@@ -11,7 +11,7 @@ export class ObservabilityPipelineGoogleChronicleDestination {
   /**
    * GCP credentials used to authenticate with Google Cloud Storage.
    */
-  "auth": ObservabilityPipelineGcpAuth;
+  "auth"?: ObservabilityPipelineGcpAuth;
   /**
    * The Google Chronicle customer ID.
    */
@@ -54,7 +54,6 @@ export class ObservabilityPipelineGoogleChronicleDestination {
     auth: {
       baseName: "auth",
       type: "ObservabilityPipelineGcpAuth",
-      required: true,
     },
     customerId: {
       baseName: "customer_id",
diff --git a/services/observability_pipelines/src/v2/models/ObservabilityPipelineGoogleCloudStorageDestination.ts b/services/observability_pipelines/src/v2/models/ObservabilityPipelineGoogleCloudStorageDestination.ts
index 77ed997a849d..0e431cc15299 100644
--- a/services/observability_pipelines/src/v2/models/ObservabilityPipelineGoogleCloudStorageDestination.ts
+++ b/services/observability_pipelines/src/v2/models/ObservabilityPipelineGoogleCloudStorageDestination.ts
@@ -14,11 +14,11 @@ export class ObservabilityPipelineGoogleCloudStorageDestination {
   /**
    * Access control list setting for objects written to the bucket.
    */
-  "acl": ObservabilityPipelineGoogleCloudStorageDestinationAcl;
+  "acl"?: ObservabilityPipelineGoogleCloudStorageDestinationAcl;
   /**
    * GCP credentials used to authenticate with Google Cloud Storage.
    */
-  "auth": ObservabilityPipelineGcpAuth;
+  "auth"?: ObservabilityPipelineGcpAuth;
   /**
    * Name of the GCS bucket.
    */
@@ -65,12 +65,10 @@ export class ObservabilityPipelineGoogleCloudStorageDestination {
     acl: {
       baseName: "acl",
       type: "ObservabilityPipelineGoogleCloudStorageDestinationAcl",
-      required: true,
     },
     auth: {
       baseName: "auth",
       type: "ObservabilityPipelineGcpAuth",
-      required: true,
     },
     bucket: {
       baseName: "bucket",
diff --git a/services/observability_pipelines/src/v2/models/ObservabilityPipelineGooglePubSubSource.ts b/services/observability_pipelines/src/v2/models/ObservabilityPipelineGooglePubSubSource.ts
index d2ccb8f8f291..fb956d6edd03 100644
--- a/services/observability_pipelines/src/v2/models/ObservabilityPipelineGooglePubSubSource.ts
+++ b/services/observability_pipelines/src/v2/models/ObservabilityPipelineGooglePubSubSource.ts
@@ -12,7 +12,7 @@ export class ObservabilityPipelineGooglePubSubSource {
   /**
    * GCP credentials used to authenticate with Google Cloud Storage.
    */
-  "auth": ObservabilityPipelineGcpAuth;
+  "auth"?: ObservabilityPipelineGcpAuth;
   /**
    * The decoding format used to interpret incoming logs.
    */
@@ -55,7 +55,6 @@ export class ObservabilityPipelineGooglePubSubSource {
     auth: {
       baseName: "auth",
       type: "ObservabilityPipelineGcpAuth",
-      required: true,
     },
     decoding: {
       baseName: "decoding",