I can confirm that:
- The In-App Purchase has been displayed in TestFlight.
- In the "App Store Connect/App/In-App Purchases", all the products has been "Approved".
- Inside of the In-App Purchase Product setting, the availability and Price are also correct.
- In one Build (same version), all the products has been selected. Off Course, that is why the products has been approved.
- In the "Business", all items' statuses are "Active", including Agreements, Bank Accounts, Tax Forms, Compliance.
It's displayed well in the TestFlight and Debugging with Real-Device Simulation. How can I fix this issue? Code or Configuration?