Brightness in Settings Can be Changed in Ventura
Over the last two years several folks have offered solutions to fixing the brightness control in settings, and many stated it did not work for them.
Oddly enough, I am one of those folks and I found a solution that worked for me.
When I pressed on the FN key up came the brightness controls on the top of the keyboard. I am now able to brighten the screen, and when I reopen after sleep, the screen is the same brightness. .
MacBook Pro 13″, macOS 13.7