I was scrolling on TikTok and saw a video about the Farlands and wanted to test it as a myth or not. Tho I didnt get the Farlands I got what seemed like a 1.17 Version of the Far Lands. The Terrain passed a certain block point seems to end at random and continues in Ocean that's floor is just bedrock. Below is a link to a YouTube Video on it. I first streamed it on Twitch then exported it over. Terrain, Items, Movement, Blocks & NPCs are all affected.

https://www.youtube.com/watch?v=Ds0nx3jn9T0