Update: purchasing and restoring full access now work in my TestFlight build. What worked in my testing: Cleared the Sandbox tester’s purchase history in App Store Connect. Signed out of Media & Purchases on the iPhone, while keeping iCloud signed in. Signed in with the Sandbox tester under Settings → Developer → Sandbox Apple Account. Completed a new Sandbox purchase, then tested Restore Purchases. The restore diagnostics now report: AppStore.sync=success full=1; unverified=0 environment=Sandbox Clearing the purchase history removes previous test purchases, so a new purchase was needed before testing restoration. I cannot isolate which step resolved the original error, but this sequence worked on my device. The separate pricing discrepancy remains: the Canadian purchase sheet shows CAD, while Product.products returns USD. Thank you for your help!