I made a data pack that turns the world into an infinite, giant maze. I couldn't find any maze algorithms online for mazes with no boundaries and had to come up with my own, so it's kind of a funky looking maze. If you have a slower pc, I don't recommend using this data pack as it might not work properly and cause a lot of lag.

A maze is generated in the nether and end as well!

To use, download the file and put it into your "datapacks" folder of the your world. Reload the world and the maze should automatically start generating. There will be a 5 second delay for the maze to start, to allow the nearby chunks to load. I recommend a render distance of at least 16 chunks.