Import Smooth mesh from Maya to Unreal Engine


I planned to smooth my lowpoly using the smooth modifier in maya but when i import the mesh to unreal engine 4, it seems like the engine read the lowpoly version of it. I’ve tried deleting the history but nothing change.
Does anybody know how to fix this problem ?
my lowpoly is rigged btw.

im using maya 2018 and UE 4.21.2