I made a post in the "your discoveries" section regarding backlight for TFT screens like the OGST case and many others. I also provided some information for devs. I think it would be nice to have TFT backlight management built in. I have my system in the bedroom and the TFT screen is rather bright. I wrote a script to turn it off, on, or toggle, but i cant see any reason that backlight control couldn't be accessible via an ES menu item.
Should be pretty easy to see if anything exists in /sys/class/backlight to decide if the menu item is enabled. and I have already provided universal "off" and "on" commands
https://forum.recalbox.com/topic/20750/turning-off-the-tft-screen-on-the-ogst-or-cloudshell-cases
Hopefully this information is helpful.