Passkeys were hot last year, don’t seem to be catching on, here’s one view of why that is. Dark and sobering but convincing: https://fy.blackhats.net.au/blog/2024-04-26-passkeys-a-shattered-dream/
The only notion I had gotten from them is that they seem to lift the burden from the user; an easier on-ramp for ‘web services’ you think have no reason for a password or account anyway.
But you have to back that up with a faq- if device or cloud does it for you, what happens when the device is lost or stolen, or ‘the cloud’ is unavailable.