Missing parts of mesh when importing object / normals issue?

Hello, I am new to Unreal engine. I have been modeling a wagon in blender and then used substance painter / designer to design some textures for this wagon. However, when importing low-poly object I am getting artifacts. I checked the normal orientation in blender and I was good there. I believe it has something to do with the normals because when I go into unreal engine modeling / attribs, normals, and select recompute normals it fixes the missing meshes from the object. When I select Accept button nothing happens and it does not fix the issue. Is there a way from unreal engine to fix my issue with these normals or something that has to be done with blender / substance painter?

Things I have tried so far. Disabling SRGB on the texture sample OcclusionRoughnessMetallic map. Also, I tried enabling flip green channel that hasn’t fixed it either. Any help would be appreciated as I am still learning 3d modeling and unreal engine.

I think I figured it out I needed to enable SM6 within the project settings. Once I did that and restarted the file the meshes started to look as they should.


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