I will add to others’ comments, that although this is the default on the communities list, make sure the “Local” option is selected to see all communities on the specific instance or “All” to see all communities the instance federates with (in other words, all the communities it allows access to)

The screenshot might look a little weird, because I resized the browser window. Also the colors seem to be a little off, probably because of image compression. I’m not sure if that’s a Lemmy thing, or perhaps just my instance