(or any other algorithms)
Which specifically? Aside from RSA and Ed25519, there is only ECDSA. If you can make provide a compelling reason of why ECDSA should be supported when Ed25519 is already supported, I’m happy to pass it along.
When post-quantum digital signature schemes (ML-DSA) are standardized for SSH (draft-sfluhrer-ssh-mldsa-00 - SSH Support of ML-DSA), that’s a very compelling case to add support for a new signature scheme.