Hi, when I’m not satisfied or for another reason decide not to rely on the previously mentioned tools one creative and interesting to create contrast that I use often, is one I believe I picked up looking at one of @kofa edit is :
Using a seperate instance of color calibration and in the “grey” tab to create a B&W conversion of the image using the R/G/B weight proposed method then setting in “blend modes” “luminance only”
This allows you to create according to the present colors bright or dark areas at will and even managing to some extend your general lightness level as you can exceed 1.0 when adding all three sliders levels.