I'm also experiencing this issue. I do see a box for "URL for App Store Server Notifications" under App Information -> General Information, but when I try to add a URL there and save, I get an error
karim-comegather
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
From
Venice