Should be there, but alternative:
store > hamburger menu (three horizontal lines - top left) > send feedback
So what's the issue?
Just missed a change log for apps in the store, so I left a vote.
MS is guilty for much xD While I was trying to give feedbac, I realized that someone at MS doesn't know how to do proper titles. To choose a category in the feedback hub left me irritated so often o.oAh yes... Some devs forego that bit. On the other hand, even MS is guilty of it sometimes lol