Since Callkit is not supported in mainland China, 'LiveCommunicationKit' is currently being used. When a VoIP push notification is received, the banner does not display correctly, but the phone icon in the top left corner, the ringtone, and vibration are present. I followed the solution in "https://developer.apple.com/forums/thread/774958?answerId=827083022#827083022" to resolve the crash issue, but the banner is still not displayed.