It might be that the attenuation radius and intensity of the light are so small that there is essentially no energy reaching the camera. You could try putting both of those up, though you might reach the maximum attenuation radius of a point light.
As a possible work around you could either try setting the emissive value on the smoke, and set the intensity of that based on the distance from the engine. You could also try a directional light to light up the craft itself.
Any luck? Same issue. Distant Niagara system not lighting up from distant point light. Rest of the geo is lit by the point light just fine but only Niagara system isn’t.