AFAIK you can’t use anything except FaceID (or other system level security options) to secure the default password manager on iOS. But Yubikey does work with iO

AFAIK you can’t use anything except FaceID (or other system level security options) to secure the default password manager on iOS. But Yubikey does work with iOS, either the NFC one or the one with the lightning connector. Third party password managers are well integrated, so if one of them supported Yubikey I think you could achieve the same UX, but I’m not sure if any do. I’m not familiar with GNU pass sorry!