E.g. If I were to share an image of a doggo on lemmy.world and then people from sh.itjust.works upvote it, will it count those upvotes? The answer to this one seems pretty easy to reason that it would be yes.
But what about if i’m on lemmy.world and am subscribed to !awesomecommunity@sh.itjustworks and I see it in my “subscribed” feed? Does this reflect total points across the lemmiverse or will this just show upvotes from lemmy.world?
It’s pretty much this. So the instance the group is on, is the controller of the group. Posts from that instance or others are sent there and that instance distributes the posts and comments to other instances with users subscribed.
Likes work just the same, you click a like, your instance sends that like to the controller instance and that then sends those likes out to subscribed instances.
It doesn’t always happen in real time though.
Glad to have your concurrence!