Can we get an official effect like this: GitHub - boredsquirrel/KDE-lower-brightness: A Kwin effect to reduce the brightness of the screen lower than supported by the display. Makes most sense on OLED or at least IPS displays.
Some displays (particularly on handhelds like Ayaneo) don’t get dark enough even at 0% brightness. This seems like such a useful feature to just have without going through extra hoops.