Custom Collision and LOD groups.

I have a question, so I have followed numerous videos on Custom Collisions made in other 3d software programs. And I have created a building using the LOD function within Maya. I then quickly added two wall for each side to test the collision (seen in the photo) and I assumed they should be sorted in each LOD0, LOD1 and so on. I tested the theory in UE4 but the collision simply don’t apply. Now my question is pretty simply, each video I have seen on YT for help only focused on model and that works like a charm. But is it not possible to combine Custom Collision and LOD Groups?