Import single mesh with multiple materials?

[andypoly]

I have a glb file with 1 'mesh' defined that has 2 primitives for the 2 materials.
I end up with 2 meshes in Unity (under parent nodes) - can I make it combine them into 1 mesh with 2 materials as they were originally before being exported to a glb?
I am not sure it would be optimal to have separate nodes/transforms for every material as it seems to be now.