I have the same question and problem. Is there a way the visor can be disengaged from its clip (like in normal cars, without breaking it) to rotate it out so harsh sun can be blocked?!
Ok, so once you shine the light at the gauges, how do you actually fix the control display brightness?! I have the same issue in my 2021 Supra (in addition to the navigation, which requires a code, but is not supplied at delivery, which issue is a separate thread here, I believe).