If you set the same iTunes account used for the purchase on a new device, you should be able to restore paid app or in-app purchase. To do so, open the AppStore app and browse your 'purchased' item to restore an app.
on iOS 11 and up: https://support.apple.com/en-us/HT201272
If you face any issue about your iTunes purchase, please contact Apple Support Team:
Article ID: 226
Category: Other mobile Apps iOS/Android
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