It's fairly easy to export/transfer passkeys (I think, I've never actually done it)

Also, many if not all of the sites I've got passkeys setup with support multiple keys, which I sometimes take advantage of. For example I've got a passkey into my Google account in my Apple account ecosystem but I also have a physical Yubikey setup as a Passkey device, in case I were to get locked out of my Apple account

>It's fairly easy to export/transfer passkeys (I think, I've never actually done it)

>I've never actually done it

You can't be serious.

If it's easy, go do it, find out, and come back here to tell us about it.