Hey again! If you are looking to make a new Cnchi function, then you will have to edit a handful of files. Namely, packages.xml, features_info.py, and desktop_info.py. Packages.xml contains all the programs Cnchi can possibly download (which are limited to only repositories and cannot installl things from the AUR). Features_info.py uses your feature packages from packages.xml and gives each a description and an icon (the icon comes from your set theme in your ISO and not Cnchi itself). Lastly, the most important file may be desktop_info.py as it lists al of the features to include by name. So basically, just add your feature name from packages.xml here too. After this, you should be good to go.
Hope this helps and good luck!
Keep trying, never give up. In the end, you will find that it was all worth it
My ISO: https://rebornos.wordpress.com