Currently searching for existing communities on other instances doesn’t always show results (if no user on your instance has already subscribed).
A workaround I have found is to search for a post from that community, after which you can access the community via the link near the username of the OP.
From there you can subscribe.
Impatience then is it? Lol I think you’re right!
Heh, possibly!
I think there’s a bit of clumsiness with it at the moment (it would be great if there was a visual indicator that it was still working on grabbing the details on the backend, or whatever), could be worthwhile checking to see if there’s an issue filed for improving that.