P.S. When posting please consider whether your problem really is urgent and requires a title that says so? I’ve removed the word Urgent from the title.
Dave nailed it.
The lack of an HDRI is whats causing the problem, the Substance 3D window has a HDR enviroment too, so your object won’t look the same as the Substance 3D window unless you are using the same one or at least using a cubemap in Play Canvas.