So let’s say I’m interested in posting on both tng.lemmy.com and on ds9.lemmy.com, but the two servers have declared themselves fandom blood enemies, and they refuse to federate with one another. Is the @flelk@tng.lemmy.com account totally unable to see posts on the ds9.lemmy.com domain?
(If this isn’t appropriate to post here, please feel free to direct me somewhere else. I’m just trying to understand how this thing works, don’t want to take the community off-topic.)
In this case you would probably register on a third instance that both federate with.