How to cancel the in-app purchase request

My daughter asked an in-app purchase over a week with the Inside-Out app on his iPad Pro (small model). I never had the request ' To buy ' and his iPad now already says "awaiting approval of the purchase.  Searched my notifications and no demand has been revieved. So how to cancel or reset the application so another request to buy the request can be done?  I've logged in and out of the iCloud, iTunes, Keychain, and Game Center with no luck. I even deleted the app and reinstalled but it comes up with the same message after being reinstalled. Any recommendation?  Thank you.

Contact Apple directly > Contact - official Apple Support

Tags: iPad

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