How did you import it? If it is rigged, with a skeletal mesh, it has to be imported as animation.
in the animation properties, then, you have to select the right skeletal animation
What was your process from VRED to Twinmotion? I see you said Datasmith to Twinmotion. Iād thought you had to send it to UE as a FBX and then transfer it to Twinmotion.