Apologies for what are probably dumb questions, but I haven’t quite found the answer that I’m looking for from all the help posts that I’ve seen.

I get the concept of how federation works (I think!?), but it seems that not all Lemmy instances federate with each other, or KBin or Mastodon.

If that’s right, then I can’t subscribe to content from a particular instance, unless my home insurance federated with them?

So (assuming I’ve got that all correct) how do I find out who is federating with who, at any particular point in time?

Bonus question: if I subscribe to content from another instance…. And someone posts to that community from an instance that my instance doesn’t federate with, I’ll still see it? Is that right?

Could someone please correct me if I’m wrong in my understanding, and help me figure out who is federating with who!?