Comment by ekr____

> It is however a document scoped so it cannot be expanded to include either of those things. Work to define interoperable use of other algorithms, including hybrid algorithms, would be in other documents.

FYI, the specification for hybrid MLKEM + ECC is ahead of this document in the publication process. https://datatracker.ietf.org/doc/draft-ietf-tls-ecdhe-mlkem/