How to play Caves and Cliffs before the update in bedrock Edition.

Sooo… My friends have been asking how I ended up in 1.18 generation minecraft worlds before the big part 2 update and its very simple. When you mske the world go down to the area by respawn radius and the turn on cheats. In between that there is a experimental versions options and one of them is called caves and cliffs. Turn it on and boom.