Question: Sign In with Apple returns
This is often caused by a mismatch of the Bundle ID. Make sure the Bundle ID is the same in your native app, and the Application configuration in the Auth0 dashboard, under “Advanced Settings -> Device Setting -> App ID”.
Apple also returns
invalid_grant when the authorization code has been already consumed. Make sure your app is not sending a code that was already exchanged for an
Documentation: Add Sign In with Apple to Native iOS Apps