The question is basically the title.
It’s very hit-and-miss. But mostly miss. That picture of a cat hiding under wrapping paper taunts me.
It doesn’t seem to be related to what instance the content is on. But I haven’t been able to find any pattern.
Is there an alternative (for non-instance-admins) that works more reliably?
They can and it has been done, IIRC Friendica or something does that…? (Correct me if I am wrong.)
Even on Lemmy, community mods can see who voted how on which posts and comments.