Other wise I just, use the search bar. I just tested it with the goal of finding a photography related community. Found it with the first search result from "photography". [1]
Another example, I wanted to find a risc-v related community, one simple search [2], boom, I found one [3]
[0] e.g.: https://feddit.de/communities/listing_type/All/page/1
[1] https://beehaw.org/search/q/photography/type/All/sort/TopAll...
[2] https://beehaw.org/search/q/riscv/type/All/sort/TopAll/listi...
Edit: Also, idk how I missed it, but the communities tab [0] also has a search, so there you go, I don't even know what else you'd want.
Here's a big list of servers (and their countries) sorted by MAU [1]. Note that the MAU data is out-of-date now that there's been a huge spike in the past few days.
It’s possible you’re seeing a bug, and it’s also possible that The System is Working.
I can tell you that the login link takes me to a form on Safari. When did tech people stop stating which browser they’re using and what quirky tools they have installed?