In fact!!
The point is that I don’t want to do a monochrome edit. The images I sent were both monochrome because I was in the middle of @rawfiner’s tutorial, where you temporarily switch to monochrome to be able to denoise each rgb channel separately (as previously mentioned by @afre, here)
I’ll keep experimenting with all suggestions and will later state my findings.
EDIT: @AxelG given that I want a color edit, I’m stuck at you advice to tweak the channel mixer channels, regardless the fact that it does what I want in monochrome.