So I still don*t know whcih default values I have changed. I need this to recommed my settings to another person who don’t want to use all my settings.
I tried it and used the whole ~/.config/darktable/ on another pc of myself. The database gets confused.
I hope I am understanding your problem correctly. In the screenshot I have gone to preferences and expanded the presets. Then I have expanded the presets for my color zones module. So I then selected an individual one hoping to export just that single preset, but when I exported every preset I had created for every module was selected. So I had to go to the export location and select a single preset I wanted to share. As proof of concept I share the preset called R7 default and attach it here.
Oh, but that’s not your original question (getting a list of your own presets).
Keep in mind that for darktable, any preset you add is one of yours. It only sees
that a preset is not one of the pre-installed ones, it has no way of knowing if you
created it, or just copied it from a playraw, or from any other source.