Passkeys are a usability nightmare. No two experiences are ever the same. I have passkeys saved in 1Password and in Apple Passwords. I have a YubiKey. I have Duo on my work computer.

A common experience is Chrome telling me to scan a QR code. But I know this is not a legitimate method to sign in on any service _I_ use. I also never know WHY I'm being told to "scan this QR code". I scan it, and my phone also has no idea what to do with it! The site has decided, by not finding a passkey where it expects it, that it MUST be on my phone.

That's but one example of the horrible implementation, horribly usability, and horrible guidance various sites/applications/browsers/implementations use.