App rejection due to unpublished in-app purchase

Hello,

I have a new app with one in-app purchase and App Store Connect says I need to submit an app for review to get the in-app purchase reviewed and approved. But, my review always gets rejected, because obviously the in-app purchase doesn't work, as the product can't be found. So I already answered this, but it still got rejected a second time. So how can I have the in-app purchase approved, before the app gets reviewed?

Thank you in advance.

Testing In-App Purchase in the Apple sandbox environment doesn’t require you submit your In-App Purchases for review. For more information, see TN3186: Troubleshooting In-App Purchases availability in the sandbox.

App rejection due to unpublished in-app purchase
 
 
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