Disable CallKit for China on iOS

Apple does not allow distribution to the App Store in China with CallKit features enabled.

There's a solution discussed here, using NSLocale to check the user's region and conditionally initialize Callkit: https://stackoverflow.com/questions/51016603/disabling-callkit-from-china-store-best-approach

The CallKeep equivalent I'm using:

  NSString *currentRegion = [[NSLocale currentLocale] objectForKey:NSLocaleCountryCode];
  if (![currentRegion isEqualToString:@"CN"]) {
    // Disable CallKit in China
    [RNVoipPushNotificationManager voipRegistration];
    [RNCallKeep setup:@{
      @"appName": @"Call App",
      @"maximumCallGroups": @1,
      @"maximumCallsPerCallGroup": @1,
      @"supportsVideo": @YES,
    }];
  }

However, Apple continues to reject my app, leading me to believe CallKeep continues to use CallKit features internally without setup.

How would I go by disabling CallKit completely? Could the locale check by any chance be implemented in CallKeep?

Start with the iOS paths that invoke RNCallKeep setup and RNVoipPushNotificationManager voipRegistration, and review the linked CallKit locale discussion. Determine whether CallKit is initialized or used without setup, then define and verify behavior that disables all CallKit-related work for the China region.