There is no audio on iOS 16 simulator with Xcode 14 and CallKit. The issue is seen only on simulator and it works fine on iOS 16 physical device.
The problem is with CallKit integration:
func provider(_ provider: CXProvider, didActivate audioSession: AVAudioSession)
This problem has been reported to Apple.
- Communications API - iOS SDK 3.6.0 and 3.7.0
No known workaround for simulator. Physical device can be used as a workaround in place of the simulator.
Third Party Reference
- Apple known issue - https://developer.apple.com/forums/thread/711956