New Facebook Page: https://www.facebook.com/OsmaniTheOttoman/
Dolores added things to her simulation, like the maze, and even Teddy, to guide her to wake up and see what she was being used for. Hale originally used her brain ball, or pearl, that was uploaded with information from the Rehoboam AI at the end of Season 3, to create the new world.
In the Season 4 finale, Dolores realizes everything and, luckily for her, Hale has a change of heart.
Source: https://www.distractify.com/p/westworld-season-4-finale-explained
New Facebook Page: https://www.facebook.com/OsmaniTheOttoman/