AFAIK, you can use a physical key anywhere you can use a passkey [1]. And you can register multiple passkeys. So it would be perfectly possible to have your log

AFAIK, you can use a physical key anywhere you can use a passkey [1]. And you can register multiple passkeys. So it would be perfectly possible to have your logins in a safe somewhere while having additional passkeys for daily use. You just need create the backup manually for each account provider. You can't extract all your passkeys from a device. But for me, the online-backup provides enough redundancy. In order to be locked out, I'd have to loose all my devices and, at the same time, be banned by my cloud provider. [1] at least that's what the Safari-UI suggests.