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.
That's good to hear. I don't know much about passkeys, and I should really spend some time learning about them. Didn't mean to fear-monger, but I guess I'm getting more cynical these days.