In addition to these well-known cartoons, Horizon on the Realm has a huge world view. The original is a light novel, which is called the thickest light novel in history because of too many settings, and then the world view of Once upon a time, the Black Rabbit is also very big, but the author obviously can't control it. ...
Basically, cartoons with huge world views are light novels or series of games. After all, a large number of world views need a lot of space to expand, but the space of cartoons is too small, and adding too many world views will make it difficult to expand the story (except for super-long stories). If you are interested in works with huge world views, I suggest you start from these aspects.