Hey guys, on my laptop I’m set to high performance, disabled power saving in my graphic properties, the issue is this
When I boot my laptop “Plugged in” to charger, first screen is dell and second screen is the windows logo with dots and third screen is the dots and my screen dims and goes back to full brightness during this screen

Without the charger plugged in it stays full brightness the whole way, no dim during the screen after the windows logo screen.

Set to High performance
Have screen lockout set to 0 minutes
bios has full brightness for both plugged and unplugged