I've been curating a list of independent code forges that might be interested in becoming part of a federated code forge network using #ForgeFed or #SourceHut:
https://wiki.p2pfoundation.net/List_of_Community-Hosted_Code_Forge_Instances

If anyone knows of any (public-facing) instances missing from the list, please let me know, or if you have an account on the #P2PF wiki, just add them.