I'm having a hard time identifying if Sign in with Apple is mandatory in our case.
We are making a b2b product with iOS app which is distributed through the App Store.
In this product users are able to tap "Login with Office 365" or "Login with Google" and a web-view opens up.
This web-view opens up our own authentication page, located on our domain (an identityserver4 login page).
That page has some logic to it, like subscription checks and from it you can then proceed to O365 or Google auth pages.
In our case, do we have to support Sign in with Apple?
