You need to join the discord if want to publish the mod officially
The mod creation is split in 3 parts
Part 1 - Creating the images, this one you do on your own, using AI or any other tool, doesn't matter, only need to be 1024x1024 png or jpg images at the end, maximum of 100 pics.
Part 2 - Tagging your images, alongside with your images will be a .ini file where you tag the images, this is the tags that shows when the player snaps a photo, could be panty colors, clothing, expression..etc and also a few rare shots that gives more money.
Part 3 - Sending to Gemma. Gemma is the person responsible to organize and publish the mods on itch, every mod has a internal ID range, so the save file doesn't conflict if you add or remove other mods, and Gemma is responsible to organize and list this ID ranges.
If you just ignore and post here your mod without this ID range set, it could be some conflict with other mods.
That's about it, right now I have 3 mods published, they are all free, only one that is exclusive found on the discord because the itch rules