Kleopatra currently does not know what algorithms / curves a smartcard supports.
Only the latest OpenPGP 3.3 card specification added a command to figure this out.
@werner How should Kleopatra choose which algorithms to offer for the user? What is the command to learn that from SCD for OpenPGP 3.3. (Yubikey)
I think OpenPGP > 3 we can offer NIST
For GnuK we can offer NIST + cv25519
For OpenPGP >= 3.3 we can offer NIST + cv25519 + brainpool?