I can agree with this. The phone is just not enough IMO.
Discussion
100% agree with you because of the way that passkeys are currently implemented on mobile. I don't believe you can export the keys from an iPhone or Android phone. No thank you!
Passkeys are great but the vendor implamantation is terrible. Apple and Google only know how to make vendor lockin as pervasive as possible so they do it even with open standards.
You know what would be great? A password manager that stores data on relays.