For those that don’t already know, Endermen cannot pick up blocks in a flat area. So, in a superflat world, they really can only teleport from place to place. Below are some links to prove this.
https://youtu.be/LLss-7SPQ-o?si=LwDxcWiF4H8eptVw&t=592
https://minecraft.wiki/w/Enderman#Moving_blocks
Caption this Meme
