IAPs to be Included in future versions

Hie, so we're working on an app that should have IAPs, but due to a few holdbacks, we have decided to release the app without IAPs.

The issue is that we would like to keep our products on App Store Connect (STATUS: Ready to Submit) whilst we continue to build the IAP functionality into our App. That means the app we submit for review won't have any IAPs until we're done fully implementing them.

I wanted to find out how can we go about that because the app is being rejected on the basis that we have unused IAP products on App Store Connect, whereas we're using them internally as developers to test various purchasing scenarios, and obviously as mentioned, they won't be visible to the public as we continue building the IAP functionality.