Gotcha, fully up to speed on what you’re trying to do 
First, I would think that limiting access to UWorld (as a property) is by design, because of the inherent risks associated. Second, from what I understand and have read, a Level/Map isn’t strictly speaking a World (yet), but just a collection of resources.
There is an older question here, with a conversation between someone asking something similar to yourself, and Epic staffer Matthew J.
Now I fully (well, mostly… almost 
) get what you’re after, I’ve hit the limit of what I know… hopefully someone can fill in the blanks!?