To start off, kudos for all the new features; I am loving it. Bitwarden is awesome. This is just a feature request – it would be nice if it supported rsa keys, so I could use it as my ssh agent. I am not expecting anything. Thanks for all the great work!
Bitwarden ssh agent supports rsa keys, it just can not create them, but you can create one with openssh, for example, and import it into bitwarden.
And for dsa keys (specifically mentioned in your FR title): I don’t see a reason to support a key type so weak that openssh deprecated more than 10 years ago; and isn’t even supported by it since version 10.
DSA keys are deprecated by openssh and will not be supported. ECDSA keys may be supported after the V2 agent has been released. In fact, the SDK already supports them, but support is disabled until the agent also does.
Post-quantum (ML-DSA) keys may be supported after they are properly standardized.
As @kpiris points out, RSA keys are supported, though the V1 agent has an outstanding bug for specific signature types (sha512) which are not handled properly.