In maya or 3ds max modeling high poly model with smooth mesh preview or modifier is a popular workflow. And there is a smooth mesh option in fbx export window.
Now Nanite supports super high poly models, and tessellation is deprecated, the new in-editor modeling tools also support Catmull Clark subdivision, but not for imported models.
If import fbx in UE with smooth mesh option support will be more convinient. So I don’t need to convert smooth mesh preview to actual mesh in DCC. And set Catmull Clark subdivision in the import window with quad mesh. After importing, the mesh is subdivided and triangulated.