New iOS App stuck at Ready for Review

I am new and submitted an app which got reviewed twice over the last 2 weeks. I tried adding IAP in the 2nd submission but it didn't get attached. I created 3rd submission and the status says Ready for Review. The IAP says (Unable to Submit for Review To submit your items for review, add an app version for the selected platform.).

There is no option to cancel the submission and restart. Previous review cycles showed "Waiting for Review" and "In Review" before I got response on reasons for rejecting the app submission. But now it appears to be stuck. I requested email support. Is there any solution that I am missing? Thanks for your help! Raja

After spending many days and weeks to find a solution, I submitted a new build with updated version number, attached IAP and then both together got submitted for review. The issue that caused dropping IAP previously maybe French cryptography declaration. When I try to attach, I couldn't submit it for review. I opted out to include France and I don't want to submit incorrect declarations so I will find a solution for this approval later. The whole sequence of app submission is mind bogglingly complex for me. It should be a step-by-step process, right?