Never mind, I found the solution in this thread.
For over a month now, in my Laptop (Dell G15 5515 Ryzen Edition) i've not managed to change it's screen brightness, either using the keys or by moving the slider, nothing works. I've tried updating the drivers, reinstalling them, reinstalling the monitor, but nothing worked, how do i fix this?
G15 5515, unable to change brightness, #2