They won't unless the dev constantly inquires about it through direct contact. If he waits for them to do this, thinking it's some sort of an working automated process then the answer is: never.
MilfToon-Grounded
Unfortunately, the whole automated system that suppose to handle this doesn't work properly. Yet they set up this very harmful notification that you just have to be patient due to backlog. This is a misleading statement. There might be a backlog but unknown number of the pending requests for confirm just fall through the system. They won't be aware you are waiting for them since the notification they suppose to get never arrives.
Why they don't fix this.. obviously they won't tell.
Contact support by email in case you haven't done so already.