to be fair there isn’t that much about the fedi in general that you can meme about. the closes you can get are in jokes but:
a) lemmy doesnt have them because this place is uncreative and only serves as a dumping ground from memes from other places when they aren’t bickering about politics
b) in jokes of different parts of fedi do not translate well just because they share a protocol, given the extremely little overlap on people here
c) they’re not really “fediverse memes” just because they happened in the fediverse, are they
Simply by choosing a lesser used fedi software you’re helping keep the fediverse from being dictated by a single software’s whims. So that’s a big plus there. Federation issues with kbin/mbin/azorius/other lesser used instance software will inevitably happen as people only test against the largest player in the field (in the ““threadiverse”” that’s Lemmy, in the microblogging fedi that’s Mastodon). So simply by not picking the largest you’re, even if in a small way, helping not only mbin but all the lesser used fedi software as a whole.
Your own local communities being “dead” mainly boils down to communities themselves having a network effect around them where the largest one keeps growing larger as everyone focuses on it. And the largest communities are usually on lemmy.world (or occasionally other Lemmy instances). There isn’t that much you can do there.
In my experience, it’s always the smaller software that innovate. The same is true in the microblogging fedi (emoji reactions, quote posts, markdown, nomadic identity, reply permissions) just as it’s true in the ““threadiverse”” (combining communities together, the ability to follow people, polls apparently (?)).
So really, don’t worry about the size of your own instance’s communities. As long as you trust your instance’s staff to keep you safe there’s no real reason not to get on a smaller instance, or on different software. Especially on here, where “discoverability” is not as much of an issue as it is in the microblogging fedi.
id argue none of those are fun topics you can joke about but “memes as a form of outrage” (aside from, like, two) which is already a problem (see all the political memes on any of the meme communities for countless examples) we do not need to encourage imo