Gah, this is the kind of thing that kills adoption. I can browse to the Caps community on https://lemmy.world, no problem. I see other lemmy.world communities on lemm.ee that I'm using and subscribed to. But I cannot get [email protected] to show up in the app or in search on the website. I tried another team community (I forget which) and had the same experience. But I've been able to add other lemmy.world communities to my subscriptions, and I know they work. Lemmy.world is listed as linked on lemm.ee, and vice versa. Basically everything says it should be working, but it isn't, so it's probably just some temporary issue.
I know once the server 'finds' it the first time, it should work fine, but right now it's just frustrating - and I'm pretty patient.
Edit: Got it. Apparently I had to hit "next".