Could you elaborate? I am assuming that everbody would have the password manager on their mobile phone with them, which is used to scan the qr code. I think that’s a reasonable assumption.
I agree that if you wanted the pc to act as the authenticator (device that has the passkey) it wouldn’t work with qr codes. But is that a usecase that happens at all for average people? Does anyone login to a mobile device that you don’t own, and you only have your pc nearby and not your own mobile phone?