If you are looking for a solution that supports FIDO2 and also functions as a hardware password manager (lots of sites still don't even support security keys) check out OnlyKey - https://onlykey.io/

OnlyKey is also open source here are some of the features: - On device PIN - FIDO2 (15 Resident keys) - TOTP (24 accounts) - Static passwords (24 passwords up to 56 char long) - OpenPGP