1.
An example of lighting location for a French map:

X:\Steam\steamapps\common\Farming Simulator 22\data\maps\mapFR

In this folder you should have a file called environment.xml, open it and search for the lines you want to change:
autoExposure
primaryExtraterrestrialColor

Copy the lines from the text file "environment" to environment.xml, where your map is. See above.

2.
Copy the contents of the "colorGrading" folder to the same location:

X:\Steam\steamapps\common\Farming Simulator 22\data\maps\mapFR
(When copying, replace old files)

3.
You do the same for the rest of the original maps.