Same problem as this thread (https://zentalk.asus.com/en/discussion/56396/problems-with-android-12) with latest available release (. 107) and after factory reset. Problem is the screen remains at low brightness level even with lots of ambient light and despite the toggle showing >80%.
Dear @Irene2_ASUS Maybe put this issue to the next fix or update patch. It's really annoying when ZF8 have a beautiful super amoled screen (A11, before update) but now the brightness is too dark after android 12 update.
I have a similar issue where the brightness will take a while to adjust to daylight. For several seconds it is too dim, but it does eventually catch up. It is slower to adjust in Android 12.