Besides lemmy, there's also lotide which has a number of instances.

I recently discovered that I can follow friendica groups using lotide, so I suspect you can also follow the same using lemmy too.

Diversity is important in this space(and I'm referring to diversity of topics, diversity of ideology, all kinds of people interested in being in different ways), and imo there isn't enough of it. Some people want all kinds of different communities and so we really need more people in that corner of the fediverse to get a critical mass where all kinds of people can enjoy all kinds of communities.