Can't adjust call volume on Liberty 4NC ?

I have been using a Liberty 4NC for a few days now and I am very satisfied with it! But I can’t turn the volume up or down when talking on the phone? Such a shame, because I have more than enough sound when listening to music, but unfortunately not when making phone calls ? I can just hear the other person, provided I am in a quiet environment. This is almost impossible while driving a car. Have turned absolute volume in the developer options (Android 14) as on and off but unfortunately, no result Does anyone perhaps have the solution?