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.
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.