alas, i am afraid that even if ukraine is able to restore its territorial integrity, most of russian citizens won’t understand that their government did something wrong. russia won’t ever be humiliated like nazi germany, to force people to think what they did wrong.
i am afraid of newer russian revanshionism and i am afraid of what their post imperial phantom pains will make them do in the future.
my impression is that majority of the russian citizens feel pain regarding the ‘lost lands’ as they often put it, as a result of ussr collapse.
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.