There’s a whole instance scraping Reddit right now. lemmit.online
Their local communities on that instance can then be subscribed to for that type of content.
Course right now memes are mostly medieval gentry and pics are John Oliver, but that bot on that instance is doing what you’re asking about.
Edit: I don’t know how well it’s working for all types of content but text based ones seem to work okay.
Currently, if you tap on the community name it brings up the community page which tells you what instance it’s on.
I do like the idea of having the community’s instance somewhere in the feed (maybe only if it’s not native to your home instance?), though.