Hi there,
We are facing an unusually long review delay for our iOS app submission.
Our app has been in “Waiting for Review” status for almost 1 week， without any update or movement. We have already request for Expedited Review
iOS app stuck in “Waiting for Review” for long time
Hey, Don't worry, You are not alone. My app also taken 12 days to get response from apple reviewer. Some time they will review deeply and they have more apps to review. Definitely they will reply to you soon.