The important thing about the fediverse is that you can federate with Lemmy but use an alternative platform. If you don’t like the devs of Lemmy there is mbin and piefed

Reddit has its own “left-lite” communities (called left lite because they definitely aren’t as far left as grad or ml) that are very popular and hit the front page constantly. The difference is that Lemmy leftists are intolerant of liberals (and vice-versa). Hopefully a bit better balance is struck here but I’ve been able to curate my feed to make liberal-leftist conflict less visible.