The problem with even using ChatGPT for this is that it will still only produce plagiarism. It cannot be creative. A fantasy world called Agnoron already exists, and ChatGPT's description steals a lot from the original creator, even if you changed the name: https://www.worldanvil.com/w/agnoron-king23/followers

You have to be so careful when using this technology to help you create an outline or inspiration, because it literally cannot produce original content.