The mesh contains some sub-meshes in a lot of glTF files. The glTF importer(official) plugin doesn’t transform all sub-meshes to the absolute position/rotation/scale. You have to transform it manually.
You can try my plugin - glTF for UE4, it is free. It supports to transform the mesh’s section to the absolute position/rotation/scale or to import your level by relative position/rotation/scale.
Following is the result by glTF for UE4.
You can see the mesh was split to some sub-meshes. You can import all sub-meshes into your level by the import option -
Import Level. And you also can import the glTF file to the editor, but you have to chose the option
Apply Absolute Transform to avoid transform meshes manually.