Aces High will use whichever mic and audio you set in the game, even if they are not on the same headset. There is a VR setting and the regular non-VR setting.
Go on-line and set your broadcast channel to yourself, then work through the audio settings until you hear yourself.
There are 4 settings in-game, speaker layout, microphone, speakers, and headset.
In Windows, be sure to enable 'applications can select audio device', or however it's worded.
Remember to check for any mute buttons etc on your headset and confirm click the OK after completing your audio modifications.