@jas@fosstodon.org openpgp-nist-bp-comp (and the codepoints it will define) is only specified for use with version 6 keys: https://www.ietf.org/archive/id/draft-ietf-openpgp-nist-bp-comp-04.html#name-key-version-binding Additionally/separately, government agencies (including BSI) have been clear that they strictly require support for RFC 9580/9980/openpgp-nist-bp-comp from their vendors, going forward.