Passkey is some sort of specific unique key to a device allowing to use a pin on a device instead of the password. But which won’t work on another device.
Now I don’t know if that key can be stolen or not, or if it’s really more secure or not, as people have really unsecure pins.
The problem with Google’s passcodes:
In fact, I have not bothered even with 2FA for google accounts. At this point these are just “garbage collection accounts” for spam and youtube subscriptions/playlists, anyway.
i don’t own a ‘device’ to use for this. i don’t even want one.