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/
Passkeys: A Shattered Dream

Firstyear's blog

@timbray I was fully on board with them and set up passkeys for every site that I use that had them available, but my experience with them has been utter crap. For whatever reason, I still end up having to auth with regular creds and/or 2FA. Entirely could be user error on my part, but if so then they would be totally worthless for someone who is not at all tech savvy. Disappointing to say the least.
@c20d @timbray I don’t think it’s user error. I think it’s vendor error. There’s no standard for how it is implemented.