Only the weird Yubico-specific OTP thing is a keyboard. The FIDO features are HID (Human Interface Device, the USB protocol for keyboards, mice, etc.) but they are not keyboards, when asked what sort of thing they are in HID they say they are 0xF1D0 ie FIDO devices, which means software looking for them can find them in order to speak the FIDO sub-protocol. I presume the PGP key stuff similarly uses its own standard protocol.
