Split audio route in active VoiceChat AVAudioSession to play at AirPlay but record using a device

Question

I'm building a video chat app for iPhone. One of the requirements that it should work fine with AirPlay. Once I'm switching to AirPlay the video goes to the AppleTV but audio stays on the phone. The resulting audio route is Speaker-and-EmbeddedMic and I don't see an option to switch the audio route to AppleTV (AirPlay) and continue to record using the mic.

VideoChat mode is NOT active - I could play audio using AppleTV (AirPlay):

VideoChat mode IS active - I have two output devices now - speaker & earpiece:

• Is it possible to use output PlayAndRecord session with VideoChat mode enabled?
• What is the possible solution for that?