adjust screen brightness on multiple monitors - need help.

so as title suggested I want to change brightness of my display of laptop. the battery icon bottom right by clicking on it brings up window's default adjust screen brightness, which is a lot of hassle multiple clicks to get to it.

I have found a few application that could help me change brightness (REAL and ONLY brightness) on multiple monitors at once but its just looks different than window's default brightness change via battery icon. there must be something thats included in window's default brightness change, maybe colors temperature or contrast I do not know which but it isn't only brightness thats changing for sure.

so, could anyone help me and tell me what the differences are? why does it look different and what other things are changed other than just brightness.

also if possible, an application that changes window's default brightness change on multiple monitors at once, which I have yet to find a working one.