u/DisciplineFast3950

I'm using an old phone (Redmi Note 10s MUIU v14) as a digital clock I programmed. Recently there must have been some update, 'Stay awake' is not in developer options, there is 'Don't lock screen', which prevents the phone from sleeping but it doesn't prevent the screen from dimming even while charging. This was never an issue for many months.

Does anyone know of a 3rd party app or OS rollback or smth as a solution for this?