I discovered a new tab in my user profile.
Very useful. I have always wished such an overview so that it can help me to trackback my downvotes so that I can if necessary undo them.
But I was wondering, can moderators see them for each other user?
No, moderators cannot see this information. Waffles confirms this in a comment here:
no ... mods can not see it
For privacy reasons, you can only see it for your own account.
Moderators cannot see the votes history tab on any other user profile other than the moderator who is the moderator looking back in the mirror.