diff --git a/.changeset/mobile-631-passkey-second-factor.md b/.changeset/mobile-631-passkey-second-factor.md
new file mode 100644
index 00000000000..a845151cc84
--- /dev/null
+++ b/.changeset/mobile-631-passkey-second-factor.md
@@ -0,0 +1,2 @@
+---
+---
diff --git a/packages/expo/src/passkeys/index.ts b/packages/expo/src/passkeys/index.ts
index 5c012765c61..b2fc418a921 100644
--- a/packages/expo/src/passkeys/index.ts
+++ b/packages/expo/src/passkeys/index.ts
@@ -1,3 +1,4 @@
 import { passkeys } from '@clerk/expo-passkeys';
 
+/** Native passkey adapter for sign-in factors and session reverification. */
 export { passkeys };
diff --git a/packages/expo/src/provider/singleton/__tests__/createClerkInstance.test.ts b/packages/expo/src/provider/singleton/__tests__/createClerkInstance.test.ts
index 6b3324ae8a3..4f08c16bedd 100644
--- a/packages/expo/src/provider/singleton/__tests__/createClerkInstance.test.ts
+++ b/packages/expo/src/provider/singleton/__tests__/createClerkInstance.test.ts
@@ -1,5 +1,6 @@
 import type { Clerk } from '@clerk/clerk-js';
 import { ClerkRuntimeError } from '@clerk/shared/error';
+import type { PublicKeyCredentialRequestOptionsWithoutExtensions } from '@clerk/shared/types';
 import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest';
 
 import { DUMMY_CLERK_CLIENT_RESOURCE, DUMMY_CLERK_ENVIRONMENT_RESOURCE } from '../../../cache';
@@ -141,6 +142,39 @@ describe('createClerkInstance', () => {
     expect(mocks.constructorSpy).toHaveBeenCalledTimes(1);
   });
 
+  test('routes passkey assertion requests for sign-in and reverification through the native adapter', async () => {
+    const createClerkInstance = await loadCreateClerkInstance();
+    const getClerkInstance = createClerkInstance(MockClerk as unknown as typeof Clerk);
+    const get = vi.fn().mockResolvedValue({ publicKeyCredential: null, error: null });
+    const clerk = getClerkInstance({
+      publishableKey: 'pk_test_123',
+      __experimental_passkeys: {
+        get,
+        create: vi.fn(),
+        isSupported: vi.fn(() => true),
+        isAutoFillSupported: vi.fn(() => Promise.resolve(false)),
+      },
+    }) as unknown as MockClerk & {
+      __internal_getPublicCredentials: (params: {
+        publicKeyOptions: PublicKeyCredentialRequestOptionsWithoutExtensions;
+      }) => Promise<unknown>;
+    };
+    const signInSecondFactorOptions = {
+      challenge: new Uint8Array([1]).buffer,
+      rpId: 'example.com',
+    } as PublicKeyCredentialRequestOptionsWithoutExtensions;
+    const sessionSecondFactorOptions = {
+      challenge: new Uint8Array([2]).buffer,
+      rpId: 'example.com',
+    } as PublicKeyCredentialRequestOptionsWithoutExtensions;
+
+    await clerk.__internal_getPublicCredentials({ publicKeyOptions: signInSecondFactorOptions });
+    await clerk.__internal_getPublicCredentials({ publicKeyOptions: sessionSecondFactorOptions });
+
+    expect(get).toHaveBeenNthCalledWith(1, { publicKeyOptions: signInSecondFactorOptions });
+    expect(get).toHaveBeenNthCalledWith(2, { publicKeyOptions: sessionSecondFactorOptions });
+  });
+
   test('recreates the singleton when proxyUrl changes', async () => {
     const createClerkInstance = await loadCreateClerkInstance();
     const getClerkInstance = createClerkInstance(MockClerk as unknown as typeof Clerk);
diff --git a/packages/expo/src/provider/singleton/types.ts b/packages/expo/src/provider/singleton/types.ts
index f3da41233d7..ea83ee912d3 100644
--- a/packages/expo/src/provider/singleton/types.ts
+++ b/packages/expo/src/provider/singleton/types.ts
@@ -26,6 +26,10 @@ export type BuildClerkOptions = {
    * @experimental This API is experimental and may change at any moment.
    */
   __experimental_passkeys?: {
+    /**
+     * Requests a native passkey assertion. This adapter is shared by first-factor sign-in,
+     * second-factor sign-in, and session reverification flows.
+     */
     get: ({
       publicKeyOptions,
     }: {