I wonder if reducing a panel bit colour depth like from the display settings would end up removing the temporal dithering / FRC also.
Because it seems to be just that according to Google Gemini:
"Temporal dithering, or Frame Rate Control (FRC), is a display technique that enables 6-bit or 8-bit panels to simulate higher color depths (e.g., 8-bit or 10-bit/HDR) by rapidly alternating between color shades within successive frames. It simulates intermediate colors that the panel cannot natively display, creating smoother gradients at the cost of potential 30 Hz-60 Hz flicker"