Close the game before any of the changes and ESPECIALLY FOR THE LAST ONE try turning device off and on again

1. Make sure you have the correct mic set as the default in settings>Bluetooth and devices>devices

2. Do the same in control panel>Hardware and sound>Sound (try toggling a different device as default then switch it back to your device if its already default)

3. Try win+g to bring up game bar then sound and change default input there

4. Finally the solution that worked for me settings>Bluetooth and devices>devices>more devices and printer settings double-click your headset and turn off hands free telephony DISCONNECT AND RECONNECT HEADPHONES AFTER OTHERWISE AUDIO QUALITY TANKS MORE