Earlier quoted context omitted.
"Sign in with Apple" requires a developer account with Apple. Having saw Epic's developer account terminated by Apple, I would definitely stay away from any "Sign in with Apple". (FWIW, the only 2fa with "Sign in with Apple", if you don't own any Apple hardware, is SMS.)
Apple did not terminate Epic's SiwA account, and several journalists have sources within Apple that say that Apple never sent the message Epic claimed to receive that said access was going away.
Not the only ones that randomly gets their accounts terminated.
Based on how apple has -insane- fragmentation and security for different aspects of the company, I would doubt any employee that isn't directly tied into the store accounts would know the whole details. (Source: GF worked for the department that did art/design for the apple stores, no one had access to their room, and they had more secure rooms that only a few employees had access to).
FWIW google has the same issues.
Don't trust a company with an account that you can't get a human on the phone for to review shit.