Then why, if I view the post on feddit.dk, does it not show me those likes/votes? What is dependent on my instance?
I don’t understand what you mean, how does it now show you the likes? If you see the two comments here and here as I linked above, you can see the high upvote count. Almost all the upvotes are from Mastodon instances.
The upvotes do not appear if you view the comments from another instance, like here and here, because those instances did not receive the Like.