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Accessing sublevels in BP

I have spent the last two weeks trying to figure this out so I wanted to see if anyone has found a solution to this. Basically my procedural world creates its environment from sublevels. Each sublevel has another blueprint in it that creates a dynamic material and has a static mesh. I am trying to access that information in the level however I am unable to create it with the streaming level because it says the object doesn’t exist.

So the way it works is

Grass_BP
Has static mesh
Creates dynamic material instance

Sublevel Grass
Has Grass_BP at (0,0,0)

Level BP
Procedurally generates through streaming levels using multiple sublevels

What I want is to get the Grass_BP’s material based off what sublevels are next to it.

I have looked through the entire forum and haven’t found a solution.