Earlier quoted context omitted.
Turns out it's only required if you already exclusively use FB/Google sign in (I thought it would also apply to your-app-auth+FB+G but I guess not) https://developer.apple.com/app-store/review/guidelines/#sig...
Huh, that was not my understanding, and your link goes on to state: > not required if...Your app exclusively uses your company’s own account setup and sign-in systems. So there’s no official guidance on the both/and case?
- If you only have social logins, you must implement apple sign in.
- If you only have your own login, you don't need to implement apple sign in.
- If you have both apple sign and your own login, you must implement apple sign in.