Chat Mixer volume control

Hello -Khia-, sorry to hear you're having trouble with your audio.

Which model headset are you using please? It may be that it uses a separate mixer for the chat and game volume. If it does not then you can either tap the Guide button on your controller and scroll down to the audio icon in the lower right corner to adjust your mixer volume there or go into your Volume Settings on the console then select Additional Option and then Chat Mixer. Here you'll want to set it to reduce the volume of other sounds by 50%.

unfortunately not yet, gamebar is used to alter the volumes only, the chat mixer on the headset and on various controllers are for console only currently.

You could do this as of the May update. Go to home, settings, display & sound, volume.. it'll give you a sound mixer for the snapped apps and chat volume control.

You Tryed use other Hedset to make test?

Try direct audio setting of the game.