diff --git a/packages/core-compat-api/api-report.md b/packages/core-compat-api/api-report.md
index 8d177b4dab..75b91cc055 100644
--- a/packages/core-compat-api/api-report.md
+++ b/packages/core-compat-api/api-report.md
@@ -8,6 +8,10 @@ import { AnalyticsApi as AnalyticsApi_2 } from '@backstage/frontend-plugin-api';
 import { AnalyticsEvent } from '@backstage/core-plugin-api';
 import { AnalyticsEvent as AnalyticsEvent_2 } from '@backstage/frontend-plugin-api';
 import { AnyRouteRefParams } from '@backstage/core-plugin-api';
+import { BackstagePlugin } from '@backstage/core-plugin-api';
+import { BackstagePlugin as BackstagePlugin_2 } from '@backstage/frontend-plugin-api';
+import { ComponentType } from 'react';
+import { ExtensionDefinition } from '@backstage/frontend-plugin-api';
 import { ExternalRouteRef } from '@backstage/core-plugin-api';
 import { ExternalRouteRef as ExternalRouteRef_2 } from '@backstage/frontend-plugin-api';
 import { FrontendFeature } from '@backstage/frontend-plugin-api';
@@ -26,6 +30,23 @@ export function convertLegacyApp(
   rootElement: React_2.JSX.Element,
 ): FrontendFeature[];
 
+// @public (undocumented)
+export function convertLegacyPageExtension(
+  LegacyExtension: ComponentType<{}>,
+  overrides?: {
+    name?: string;
+    defaultPath?: string;
+  },
+): ExtensionDefinition<any>;
+
+// @public (undocumented)
+export function convertLegacyPlugin(
+  legacyPlugin: BackstagePlugin,
+  options: {
+    extensions: ExtensionDefinition<any, any>[];
+  },
+): BackstagePlugin_2;
+
 // @public
 export function convertLegacyRouteRef<TParams extends AnyRouteRefParams>(
   ref: RouteRef<TParams>,
diff --git a/packages/core-compat-api/src/index.ts b/packages/core-compat-api/src/index.ts
index 88e1892eac..7f99a7ab7a 100644
--- a/packages/core-compat-api/src/index.ts
+++ b/packages/core-compat-api/src/index.ts
@@ -18,6 +18,8 @@ export * from './compatWrapper';
 export * from './apis';
 
 export { convertLegacyApp } from './convertLegacyApp';
+export { convertLegacyPlugin } from './convertLegacyPlugin';
+export { convertLegacyPageExtension } from './convertLegacyPageExtension';
 export {
   convertLegacyRouteRef,
   convertLegacyRouteRefs,