The photos you can collect are generated by a custom AI model and overpainted by hand. That's the only way for a solo dev to have such a game with 300+ photos to collect :)
Itch.io has a dedicated „AI generation disclosure“-function, where my game is marked as using Generative AI for Graphics.
Tags are not to be used for this, because a game can only have 10 tags and these are importing sources for players to find my game. eg when they look for the tag “Hentai”.