mine is perhaps a mastodon with dislikes
a loops like but for youtube shorts instead of tiktok
email (i am not technical but since it is hard to self host email what if someone made a email that could be self hosted that is a part of the fediverse)
and a facebook like that isnt outdated as friendica


I don’t mean to argue with you on your idea, but YouTube shorts, Instagram reels, and tiktok are the same thing. Loops basically is just that. The only difference I can think of (aside from maybe technical behind the scenes things in how each company did it) are the communities and content.
Is that what you want? Loops to just be more like shorts than tiktok?