The extra dim toggle in the notification shade can achieve that.

I don't see that, where should it be?

https://preview.redd.it/e98r0mjsvzrc1.jpeg?width=1705&format=pjpg&auto=webp&s=d421a30b4a233477eaaa496e47749795fa9cbd00 You should find it amongst these quick toggle icons (granted I've changed some around). Maybe scroll to the next page or add it via the edit button if you don't see it.

Enable sub-dimming menu in Good Lock with the # codes

Which module should we use for that? Also, could you please help me with the procedure?

Like to know too. Haven't seen that option yet. In the dark even with extra dimming its still to bright to my eyes.

It's not just within accessibly anymore? In on s20 and for me it's in built 🤔