When I look at https://lemmy.ml/c/startrek vs https://kbin.social/m/startrek I see two entirely different lists of posts. Why? It’s the same topic, just on different instances. How can we have communities about topics without having them siloed into their own instance-based communities? Is this just related to that 0.18 issue with Lemmy/kbin not talking nicely, or is this how the Fediverse is?

Is it (at least theoretically) possible for me to post an article on https://kbin.social/m/startrek and have it automatically show up on https://lemmy.ml/c/startrek, or are they always going to be two separate communities?