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If you open via browser, it linked to this post but in Kbin, there you can find your comment and click “More” then “Activity”, click the “Favorite” tab and you can see the people who voted your comment.
Edit: to clarify, kbin already have that ability to see upvote(favorite) and downvote(reduce). I think admin also have the ability to set the visibility of downvote because i used to use kbin to check for random downvoter before admin here get the update for the function.