It's available for me on kbin.social as of this writing, and I subscribed.
As far as I can tell, what one needs to do on kbin is search for communityname@instance to start the indexing process. I don't think that "!" goes in the search string.
But that's already run by now.
For people on kbin.social, you should be able to see it at:
https://kbin.social/m/[email protected]
If you're on another kbin instance, do the above search. I'm still a little fuzzy about the right syntax in a comment to produce a link to perform such an initial search in a cross-lemmy/kbin, cross-instance fashion. I think that it should be:
!@[email protected]
Giving the following:
!@battlestations
But I could be wrong. I really wish that this particular issue would be made clear, as it's important for community discoverability.