Security token as 2nd factor for login

I got a security token SoloKeys Solo - FIDO2 security key
(USB only)

It works for U2F authentication through a web browser as per

But how to use it as a 2nd factor for logins?
From where to get

Any hint?

This is currently not yet integrated - We’ll put it on the list. It shouldn’t be too difficult to compile yourself, but, you can also wait for it to be available in a bundle.