Hi, It would be great if my YubiKey's FIDO2, U2F, OTP, OpenPGP 3 functionality could work inside an RDP session, specifically from macOS.
We're running into similar issues trying to roll out WebAuthn everywhere. We've found that macOS users can run a windows VM in UTM, share a yubikey into the VM with USB passthrough, and then use RDP inside the VM to authenticate on the remote workstation. I assume there's some privileged stuff that needs to be done on the macOS host to achieve USB passthrough, but being able to use a yubikey right now through a whole macOS->VM->remote chain says to me that this should at least be technically feasible.