Lemmy is a wild frontier right now. Every space is going to organically grow and there may be some duplicates until the dust settles and each area of interest has one ‘go-to’ community that is larger than the others.
So far from what I have learned is it is a common problem with the Fediverse. When I made this on Lemmy.world it didn’t communicate with lemm.ee to see their community. And that’s ok! We can both grow and be great. I just wanted to ensure our community had a place to come!