Tagging @[email protected] as well in case either of you haven't got it working yet. Just take the actual URL of the Kbin mag and search for it from your instance, like you would normally search with the ! syntax for a Lemmy community.
So, if I search for https://kbin.social/m/Bestof I get no results. To do this, I went to "Communities" at the top of the page, then searched for that URL. I got this as a result:
For a second I was confused because searching it works fine for me, and we're both on lemmy.world.
But I think the difference is you're trying to do it through the communities list whereas I went straight to the actual search page (as in https://lemmy.world/search, from the search icon in the header), so maybe give that a whirl?
Idk why they'd be so different but I get tons of results including the magazine itself so 🤷♀️
Edit: figured it out, when you search from the communities page it's setting that dropdown (the one in your screenie under the "search" heading) to "communities". Community search with that is broken atm and you have to use "all" instead, which is why it was working from one screen and not another. I think the broken community filter is one of the fixes listed in 0.18 🤞
That search finds Bestof.. as in your post but there's not "Subscribe" button so how do I add it to my subscribed communities? Sorry for teh ignorant Q, i'm ignorant
Searching for [email protected] does the same (iirc the latter is the preferred way to get to a federated instance's community, but I'm a noob so waht do i know?)