The SAML support in https://github.com/go-gitea/gitea/pull/29403 seems like it will get merged once the MR is a little bit higher quality.
EDIT (bit better source):
> Gitea Enterprise is an offering of CommitGo, not the Technical Oversight Committee of Gitea or the Gitea project itself. CommitGo remains committed to contributing back functionality to Gitea under the MIT license.