Can't Adjust Brightness on Macbook Air

Hey there. I'm facing a brightness issue for the last few days. I'm using Macbook Air M1 on the latest version of Ventura. I simply cannot adjust my screen brightness. The keyboard brightness buttons and brightness sliders are working just fine. But the actual screen brightness do not increase or decrease. Unfortunately I believe I am the only person facing this issue on the entire planet, since I couldn't find any fix online. I have tried almost everything, including re-installing the current OS. I have booked a call from Apple Support for tomorrow and if that doesn't help, I will have no choice but to take the device to an Apple store. My Macbook is still under standard warranty. Any and all help will be appreciated. Thank you...