We have been pursuing an issue with Apple Support but so far have not been able to get the advisors to understand our issue, so I am posting here in the hope that someone has a solution.
We are working on a new app that has IAP. Our first submission failed app review. After making changes to the app to address Apple's concerns, we submitted a new app build but we could not include the IAP because the "In-App Purchases and Subscriptions" section was missing from "Prepare for Submission." The app reviewer flagged the build as incomplete because of the missing IAP. If we go to submit another build, that section is still missing from the UI.
Is it expected that the "In-App Purchases and Subscriptions" section would be omitted even though the app has never passed review? Since we are required to submit our first IAP along with an app submission, this seems like a bug in the App Store Connect interface.