Same failure here, on a newly enrolled team. A sysdiagnose taken with the Accounts/AuthKit profile shows the same backend lookup failure. Team ID: LHK4C7MAP5 (Individual, enrolled 2026-08-04) Bundle ID: com.tisza.app (App ID CR72WGH337) Sign in with Apple is enabled as a PRIMARY App ID — verified via the App Store Connect API (APPLE_ID_AUTH / APPLE_ID_AUTH_APP_CONSENT = PRIMARY_APP_CONSENT). Only one Bundle ID exists in the team; no wildcard and no grouped App IDs. Device: iPhone, iOS 26.5.2 (23F84), TestFlight build. Feedback Assistant: FB24195637 (sysdiagnose attached) The log confirms the entitlement is read correctly from our signed binary, and that the failure occurs only in Apple's backend team lookup: akd [authkit:siwa] Client has default access level in SiwA entitlement akd [authkit:siwa] Setting clientID to com.tisza.app akd [authkit:siwa] Setting teamID to LHK4C7MAP5 akd [authkit:siwa] Fetching developer team for client with ID: com.tisza.app akd [authkit:siwa] Encountered error while fetching developer team: Error Domain=AKSQLError Code=-6003 "(null)" akd [authkit:siwa] No applications were found with the provided Client ID: com.tisza.app -> AKAuthenticationError -7003; the sheet shows "Sign Up Not Completed" App Review reproduced this on their own device and Apple Account, and rejected our submission under Guideline 2.1(a).