Actually you don't need multiple accounts, you only need one in a specific instance and can interact with other instances (My account is registered at programming.dev).
The UX is extremely wonky and I had to look it up, but you can go to the search in the top right of your instance's main page (not the "communities" subpage) and search for communities and filter by "Communities" in the top left
Consolidating on one Lemmy instance
cross-posted from: https://programming.dev/post/24889...