Yeah, that Apple case was really interesting. I always guessed that Apple could simply push a software update (possibly to everyone) that happens to open a backdoor for a specific phone. I wonder if that's what they did.
What happened in that case is the FBI went to a different vendor, and they broke into the iPhone either with a zero day they had developed or more likely, they just cloned the phone hardware thousands of times until they could guess the password.
Maybe - depends on how secure enclave is built. It may have hardware defined limitations on # of tries for the passkey and no way to circumvent that in firmware even.
