I tried the metallic workflow and no result. The imported material looks different, but also incorrectly.
For me, it looks like UE expects C4D’s material to have a specific set of textures set in specific order and hierarchy. But I cannot guess that “magic recipe”. I tried different workflows with different combination of reflection channels just randomly changing them, but couldn’t get the proper material look. And in Datasmith documentation they don’t describe the requirements for the material settings.
Here is one of the examples of how I do that:
