@arnavpadwal Hi and welcome to the forum.
Does the Brightness slider tool in the in the panel adjust your screen brightness OK, or is it just your hardware keys. On my laptop (Not Acer Aspire) you have to press [Fn]+F6 and [Fn]+F7 to adjust brightness.
I don’t have an Acer Aspire to try those hardware brightness keys myself, but I am sure others on here do. @Aravisian maybe.
Note there is also a “screen brightness” slider in Zorin>Settings>Power