Hello @MStraeten
Thanks for your reply!
In the past, as regards RawTherapee, I was used to get the LCP profiles for my old NIkon Lens thanks to the ones provided by Adobe (Adobe Dng converter - the folder containing it).
At present, Adobe does not ship these files any longer for Nikon Z modern lens because these information are already present in the NEFs file and, as soon as, you work with them (e.g. with Lightroom or other softwares) you are already covered as regards the lens distortions.
In all truth, I usually take only macro shots, with a tripod, in a laboratory (plant diseases), and do not need to correct any lens distortions.