StoreKit subscription product not returned during App Review – DRIVER BRAIN iOS

Hello Apple Developer Community,

I need technical assistance with a recurring StoreKit subscription issue affecting my iOS application, DRIVER BRAIN.

Application details:

  • App: DRIVER BRAIN
  • Bundle ID: com.oney.driverbrain
  • Subscription Product ID: com.oney.driverbrain.premium.monthly
  • Subscription price: $9.99 USD per month
  • Introductory offer: 3-day free trial
  • Development framework: Flutter (iOS)

Problem:

During Apple's App Review, the subscription product is not being returned by StoreKit.

The purchase screen displays the message:

"Apple has not returned the subscription yet."

As a result, App Review cannot complete the subscription purchase flow, and the application has been rejected under Guideline 2.1 – App Completeness.

Checks already completed:

  • Subscription Product ID verified.
  • Bundle ID verified.
  • In-App Purchase capability enabled.
  • Three-day introductory trial configured in App Store Connect.
  • Paid Apps Agreement active.
  • Banking and tax information active.
  • Subscription availability reviewed.
  • Sandbox account configuration and physical iPhone testing performed.

Despite these checks, Apple's reviewers continue to encounter the subscription loading problem.

I would appreciate assistance from Apple's StoreKit engineers or experienced developers with the following questions:

  1. Why might an auto-renewable subscription product not be returned during App Review?
  2. How can I identify whether the issue originates in StoreKit product retrieval, App Store Connect configuration, or the review environment?
  3. Which StoreKit diagnostic logs or code excerpts would help identify the root cause?
  4. What is the recommended technical solution to ensure the subscription product loads reliably during App Review?

I am looking for a definitive diagnosis rather than repeating configuration checks that have already been completed.

Thank you for your assistance.