import 3dxml by datasmith

I have a 3dxml file, in this page “Datasmith Supported Software and File Types | Unreal Engine 5.5 Documentation | Epic Developer Community”, datasmith support 3dxml directly, but when I open the datasmith importer, it can’t find the .3dxml fle , how to import?

Which version of the engine are you using?
Did you activate the Datasmith CAD Importer plugin?