I installed a RPi4 with Touch Display 2 and SmartPi Touch Pro 3 yesterday. It works like a charm with one exception. I cannot change the screen brightness. The sliders are there. Maybe there is some tiny tiny shift in brightness but I do not think that this works like intended.
Du you have an idea about this behaviour? Unfortunately the screen is too bright for me in low light conditions. Is there a difference between Display 1 and 2?