Check sub.rehab for a list. A few of them are official (the old Reddit mods are the new mods of those communities), while some are spin-offs (comms created for the same purpose as the original).

The site above is listing alts elsewhere, too - raddle.me, kbin.social, even Discord. Note that you can often access Kbin content from Lemmy and vice versa.

The right term is "community". Personally I shorten it to "comm", have seen other people doing it but it isn't that common. I'd advise you to avoid "sub", as plenty people call it out as "Reddit thing".

Also, please keep in mind that this community is about Reddit, not Lemmy. You'll probably get better answers in a comm about Lemmy itself, such as !lemmy_support@lemmy.ml

There was a tool being promoted a couple of days ago that sounded like it would help port your Reddit account over to lemmy by (I’m assuming) looking for identically named communities and subscribing to them. I went scorched earth on Reddit and deleted my comments and accounts, so I didn’t look at it beyond thinking it was a good idea.

I wish I could remember what it was called, but knowing that it’s out there might help you to track it down.

sublemmies

#communities*

There’s this, though I don’t think it’s been updated in three months: https://www.quippd.com/writing/2023/06/15/unofficial-subreddit-migration-list-lemmy-kbin-etc.html

Lemmyverse.net is definitely the best universal search option. You can even set your home instance so all the links open properly for you

Would also be interested.

I know there is a Lemmy Community Search but I don't know if a dedicated list for moved subreddits exists. Unless you ask the original mods from reddit or find a link it is almost impossible to say.

Also I believe they are called communities?

Lemites