It does not work for me on my Linux PC with Firefox, PayPal simply refuses to enrol passkeys and Amazon tries but then gives an error. I haven't tried chromium as I don't have it installed.

I'll give it another try though. The last time was 1 year ago. I don't normally use Bitwarden so I have to set it up from scratch with vaultwarden etc.

This is probably a Linux issue. Mac OS and Windows implement the FIDO2 Platform API, which allows them to act as authenticators themselves. Linux does not. See https://github.com/linux-credentials.

With macOS and Windows I'm still stuck in corporate ecosystems though which was my point. I used to use Mac but I couldn't deal with the increasing iOSification and I only use windows now for gaming (VR) because it's such an awful OS.

But that's another point, I do use many OSes so being locked in to one ecosystem is not an option. I must also have the option to back up my credentials at all times (eg a cloud service will never suffice)

But yeah I should have mentioned Linux. I thought it was the norm here really especially among people advocating against corporate ecosystems.

Jfc the quality of information shared on this site is abysmal nowadays.

I use Bitwarden, I use Android, I use Firefox on Linux. Passkeys work just perfectly fine on all of the sites listed here thus far.