I'd like to know about the use case where an iOS app depends on Facebook for its core functionality.
When running the app, the user cannot proceed unless they sign in with Facebook. Once they sign in, the Facebook SDK is used for a variety of purposes that are core to the app's functionality. Without Facebook, the app has no purpose or usable features.
Is Sign In with Apple required in this case?
According to https://developer.apple.com/news/?id=06032019j
"Sign In with Apple ... will be required as an option for users in apps that support third-party sign-in when it is commercially available later this year."
