You can see who upvoted and downvoted a post by viewing it in friendica.
Upvotes seem to just federate as likes and dislikes.
You're viewing a single thread.
Same was the case on /kbin, and while Mbin got rid of the downvotes, it still has public upvotes.
kbin also got rid of the ability to view downvotes. I believe either before the fork or at least before the implosion while mbin were still mostly just pulling from upstream.