(original commenter) I'm using GrapheneOS which to my knowledge has support for this, the problem is that every attempt to authenticate fails due to user presence not being confirmed. When I first tried using the NK3 for FIDO2 with Windows it prompted me to create a PIN, which I did, any further attempts to use FIDO2 require me to enter this PIN. This works fine on Windows (The Hello API or whatever they're using), but not so much on Linux (Firefox doesn't support CTAP2 yet, so I'm not prompted for the PIN at all and the authentication freezes then fails, Chromium works though) and on Android I get the same story of being able to use the key but not being able to enter a PIN. Is this something I could've messed up?