let me list two not federated options.

but both are self hosted.

• lobsters. one active instance is lobste.rs but i know of https://սարեան.ցանցառներ.հայ

• if you use gemini protocol, you probably know about it: bubble is a reddit like software. i know about two deployments, the original, by the author is at gemini://bbs.geminispace.org

users also can have their blog feeds on it.

xmpp (jabber)

i use nfs. always. every minute my computer is online it has a mounted directory from my server.

via nfs and wireguard.

i tried lots of things but nfs which listens on wireguard ip is the best i ever achieved.