Apple Sign In provides null fields even for first time Logins

[mtalha101]

Problem

I've tried sign_in_with_apple as well as AppleAuthProvider with FirebaseAuth in order to allow users to sign in using apple. Unfortunately, a sheet that displays the option to users for hiding or sharing their email doesn't show up as it should for the first time logins. The screen directly displayed the Continue with Password sheet.

Screenshot

Expected behaviour

The sheet should display full name and email sharing/hiding option to the user in order to retrieve those fields from the backend. Otherwise it will keep returning null values for both scopes.