Where can I find the in-app purchases transaction details in my Apple developer account? I need to know this because I want to find out if a player can get a refund if something went wrong with the in-app purchase. In addition, my application is not published in the App Store. I use TestFlight to test the in-app purchases. Are the test in-app purchases recorded somewhere in my Apple developer account?
Financials are available in App Store Connect while testing in Sandbox or with TestFlight are free transactions, therefore not in the financials. For a record of the transaction itself so your app/server know what to entitle/deliver/enable to the purchaser, then you will find that in the App Receipt or JSW Transactions. Whether you send transaction data to your server is up to you. Please refer to this documentation for more information on In-App Purchases and StoreKit. https://developer.apple.com/documentation/storekit/in-app_purchase
Is it possible to refund in-app purchases in App Store Connect when a player has bought a product in a published game?