Is there a community to discover other lemmy communities?

https://lemmy.world/c/newcommunities

This is a community that I've checked out before and even promoted my own community to, and there's some neat stuff you'll find there!

I use, in order:

• in instance search
• https://browse.feddit.de/
• user profiles
• the list of instances connected to mine
• https://lemmy.fediverse.observer/

https://lemmy.world/communities

or check "newcommunities"

Maybe any of these will help. !newcommunities@lemmy.world !wowthislemmyexists@lemmy.ca, !lemmy411@lemmy.ca

I mostly search on lemmyverse.net though

https://lemmy.ca/c/wowthislemmyexists

https://lemmy.world/c/newcommunities

I list a few external directories here, although they are currently largely aimed at helping people find a Lemmy equivalent to their favourite subs.

There is lemmyverse.net.

Yessir! Find a Community on lemmy.ml

!findacommunity@lemmy.ml

In addition to what's already been provided by other comments here you can try https://browse.feddit.de/

Mostly lemmyverse, but also sub.rehab to see where subreddits are migrating to.