afaik none of the current options offer fedi support.
Forgejo is a Fork of Gitea made because Gitea is managed by a For-Profit company. Their code is almost identical, in fact Forgejo is a drop-in replacement for Gitea. Gitea and Forgejo are (iirc) both working on the same federation support but Forgejo seems to be further ahead since they announced that they’ll upstream the Federation code to Gitea.