diff --git a/plugins/woocommerce-admin/client/customize-store/index.tsx b/plugins/woocommerce-admin/client/customize-store/index.tsx
index a1d1a4eb2a7b..33a3a2c1093e 100644
--- a/plugins/woocommerce-admin/client/customize-store/index.tsx
+++ b/plugins/woocommerce-admin/client/customize-store/index.tsx
@@ -83,9 +83,15 @@ const redirectToWooHome = () => {
 };
 
 const redirectToThemes = ( _context: customizeStoreStateMachineContext ) => {
-	window.location.href =
-		_context?.intro?.themeData?._links?.browse_all?.href ??
-		getAdminLink( 'themes.php' );
+	if ( isWooExpress() ) {
+		window.location.href =
+			_context?.intro?.themeData?._links?.browse_all?.href ??
+			getAdminLink( 'themes.php' );
+	} else {
+		window.location.href = getAdminLink(
+			'admin.php?page=wc-admin&tab=themes&path=%2Fextensions'
+		);
+	}
 };
 
 const markTaskComplete = async () => {
diff --git a/plugins/woocommerce/changelog/45288-45284-cys-on-core-ensure-the-user-is-directed-to-the-in-app-marketplace-whenever-clicking-on-browse-all-themes b/plugins/woocommerce/changelog/45288-45284-cys-on-core-ensure-the-user-is-directed-to-the-in-app-marketplace-whenever-clicking-on-browse-all-themes
new file mode 100644
index 000000000000..b140e047126c
--- /dev/null
+++ b/plugins/woocommerce/changelog/45288-45284-cys-on-core-ensure-the-user-is-directed-to-the-in-app-marketplace-whenever-clicking-on-browse-all-themes
@@ -0,0 +1,4 @@
+Significance: minor
+Type: update
+
+Ensure the user is directed to the in-app marketplace whenever clicking on 'Browse all themes' within the Customize Your Store flow.
\ No newline at end of file