I did export it as a 2016/2017 FBX. I just tried exporting and then importing it back into a new scene inside of Maya. It gave me this warning/error after importing:
Warning: BindPose - incomplete BindPose [nodes parents] (5)
EDIT:
I just fixed this error, still did NOT fix the UV problem! The problem was that inside of Maya, I had to select the base mesh and all the LOD meshes and to go Modify > Evaluate Nodes > Ignore All. Save and Export again. I tried reimporting to a new Maya scene. The warning/error was gone but then I tried importing back to UE4 and the UV are still gone. So it’s definitely a UE4 importing issue…