This doesn’t help for Gmail. I moved to a different part of the country and I have a spam email account that isn’t connected to a phone or second email. Even with the right password, it wouldn’t let me log in because I was trying to sign in from a different location and no secondary way to authenticate.
Luckily it was a spam email so it was just annoying to recreate some accounts I used for that email, but yeah ve warned.
Password managers support passkeys.