Linux Remote Desktop Authentication - Is ThinLinc compatible with Yubikey?

I have tried to access FIDO2/WebAuthn in Yubico Authenticator version 7, but this is giving an error.

Specifically I’m using ThinLinc to access a remote Linux machine (tried Debian and Arch)

I’m choosing to redirect the Smart Card Readers to send my local Yubikey to the remote machine.

FIDO2/WebAuthn works if I am logged into the Linux machine directly; but when connecting in ThinLinc this doesn’t work. Thinlinc does indeed work with the Yubico Authetnicator Accounts section.

See included image

Any idea how to get FIDO2/WebAuthn to work?