There's things like hashtag searches and whatnot, but none of it is algorithms; in the sense we understand it to mean, here, these are not manipulative algorithms designed to keep people on a site and keep ads rolling by.
on the fediverse, there are bots to curate content such as "most liked", one can subscribe to these bots to see such "views" of the feed.
there's absolutely no reason for any of that crap to be built in, other than that's how reddit (and HN) do it.