FIDO2 toolbox in Java and X-FIDO JavaCard applet
Why do you think that https://github.com/martinpaljak/nfc4pc is a good alternative to FIDO2
FIDO2 toolbox in Java and X-FIDO JavaCard applet
Why do you think that https://github.com/martinpaljak/nfc4pc is a good alternative to FIDO2