Twinmotion 2025.2 -> UE 5.5.3 via Datasmith geometry imports fine but all meshes are no materials

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Hi! I followed the official Epic tutorial Twinmotion to Unreal Engine Workflow and the import partially worked the geometry shows up correctly in the scene, but every object is gray with no textures or materials applied.

Exported the scene from Twinmotion 2025.2 via Datasmith (.udatasmith)

  1. Imported the file into UE 5.7.3 using the Datasmith Importer

  2. Geometry imported successfully, but with no materials, everything appears as a gray mesh

Note: The Twinmotion 2025.2 release notes mention that full material support via Datasmith targets UE 5.5.4 to 5.6.0, which makes me wonder if UE 5.5.3 is just outside the supported range for this version of Twinmotion.

Question: Has anyone successfully imported materials using Twinmotion 2025.2? Is there any additional setup required, or is this a version compatibility issue