Skyrim, including the Special Edition, has separate meshes for high and.
Unfortunately FO4 uses a different mesh system for armors than Skyrim. expand the 0 NiNode and click on the NiTriStrips of the armor piece you want or just click on the armor piece in.
2) start a new project in OS for F04 using the Skyrim CBBE -> FO4 CBBE reference.