Kbin let's you see it all, on a thread-by-thread/comment-by-comment basis. For example I'll (for a moment) downvote your comment. If I check it's activity, this is what I see. https://imgur.com/a/uTgEuUt

Favourites is upvotes, reduces are downvotes, boosts are the twitter/mastodon 'retweet' equivalent. Doesn't matter what instance the comment is on, kbin, lemmy, we can see them for posts and comments. Solely on the thread. I can't go to your profile and see a history of what and who you downvote, but if you downvoted/upvoted me right now for example, I can 100% tell who you are and which you did.