One of the biggest and most nebulous questions related to the Maze Runner movies is how many mazes WCKD ran throughout the movie franchise. Based on the books by James Dashner, the movie series explores a dystopian world after the Maze Runners virus called the Flare turns humans into mutant zombie-like monsters called Cranks. To try and find a cure, an organization called World In Catastrophe: Killzone Experiment Department (WCKD for short) puts a group of teenagers into an experiment where they must survive without resources next to a maze filled with monsters called the grievers.

https://screenrant.com/maze-runner-movies-how-many-mazes-wckd/