M1 MacBook Air screen auto dimming despite settings

I and others I know with the same hardware and despite "Displays" > "Automatically adjust brightness" being disabled, the screen dims constantly. It's frustrating because I'm in a bright area and it's hard to see the screen without straining. I saw instructions for fixing this in another post Unwanted automatic screen dimming (MacBoo… - Apple Community but the instructions only seem to apply to Intel