or SoloKey
Unfortunately SoloKey doesn't work as an OpenPGP smart card, which means it's not a real substitute for a Yubikey. I haven't had any luck with resident FIDO2, either.
The Solo team believes that other functionality such as PIV overlaps with GnuPG use cases, so that OpenPGP isn't a priority, and their work on that functionality appears to have stopped in 2021. That's too bad, because OpenPGP's network effects far outweigh its pure functionality, which means a technical substitute isn't a substitute.