Ideally, you want a separate Google Voice number as your trusted phone number and to have no unauthenticated access to that Google account from the phone. I als

Ideally, you want a separate Google Voice number as your trusted phone number and to have no unauthenticated access to that Google account from the phone. I also just checked and you actually can’t even change the trusted phone number without logging into applied.apple.com, and you can also register the numbers of trusted friends or family members as a backup to recover access. So the situation is not as concerning as the original post suggested, if you’re careful.