According to this site, versions beyond the one I chose does not exist however that's not the case.

The most recent patch as well as the patch prior that extended world depth, did not account for the new or generation. I was expecting it in this patch however, I'm extremely disappointed to find nothing but stone at y = -64 and a lot of the cave generation spawns lower now so it's a lot of boring strip mining and no caves... Please update the or generation now that the world's gen is fixed.. please don't make me wait a week!!!Unable to render embedded object: File (  Fugawdsnakes) not found.

And to any moderators of this site that can read this please update the available versions of beta Minecraft bedrock edition.