[UE5.6][Interchange GLTF] How InterchangeGLTFPipeline is supposed to replace/customize imported materials?

Hello,

I am trying to import a GLTF created with blender and I would like to use the “Interchange GTLF settings” in order to replace imported material, but I am not able to use it and I don’t find any documentation about the subject.
I mean those settings :

Let’s take a basic example with blender. A simple cube with a material named MI_Sheen_Blend_DS which should used the existing MI_Sheen_Blend_DS from Unreal during import :

After import into unreal, a new instance of MI_Default_Opaque_DS is created with base color from blender :

It is not the behavior I expected. Is it normal ?
I would like the base color from Blender but the material settings (e.g: 2 sided, translucent…) from Unreal.

Note: behavior was the same with UE 5.5

Thanks for your help.