Does Google Sign in require Firebase?

I can’t really see why it would, but the documentation for Google Sign in is written in such a way that makes it appear as though Firebase is a part of Google Sign in. It just casually mentions “open up the Firebase Console”.

Obviously, outside of React Native, you can use Google sign in easily enough. I can’t see why this would require Firebase in React Native.

For anyone getting here in the future, you don’t need Firebase, it’s just that there are 2 completely different APIs in Expo for handling Google login. Here’s the one I used without Firebase:

https://docs.expo.io/versions/v35.0.0/sdk/google/

oh you change to other API.
appAuth have bug in bare workflow from a year ago which is not fix until now.