[archi42]

Thanks, I appreciate the effort you put into the answer; though I know how ssh keys work and the basics about FIDO as well ;-)

I got the hyperfido 5 years ago and doubted they're still selling the same hardware today. I exchanged a few mails someone from their C-suite back then on the topic of using the keys for SSH, and it wasn't easily possible back then (also: he seemed very nice [cue Canada meme], so I didn't want to spread falsehoods about the company on HN). Actually I checked right now, and their current offerings seem to support FIDO2 (also: the model number & name changed slightly). So I suppose their current generation should work.

//edit: ah, your pointer was still worth the effort. I tried non-resident and ecdsa-sk works with my key (but not ed2219-sk). I still need a new key because I want to have a resident key :)