KKH 28 week scan 3d/4d

Hi mummies!! I’m a FTM & i will be having my first 3rd trimester scan in 2 weeks’ time which i’ll be 28 weeks then. May I know during the growth scan, do doctors/nurses let us see a 3D/4D scan instead of the normal 2D scan or we must request in advanced? I’m a subsidised patient anyway. #advicepls