Yeah, this answer is pretty poor. An actual explanation would be super helpful. In your configuration, how are you setting up both ids (the app id and the service id) for the app and web implementations? We have an environment variable like this: SOME_VARIABLE="com.something.web, com.something" # NOTE: Both the service id (first) and the app id (second) are present here This appeared to work but we just discovered that Sign In With Apple is NOT working for mobile in this setup.

Yes, this worked for me too. Thanks so much!