I found this https://github.com/Marie673/Torrent_Proxy
Its in chinese so idk if its whats needed but if each instance also acted as a torrent proxy then thats decentralised domain agnostic file hosting that doesnt break frontends but also allows clients to update to do resource resolution themselves while helping to serve the fediverses files as a whole.
When will a client be available on fdroid?
Untill then im not gonna try