I can’t get it to work if I enter the camera product ILCE-7M3 direct - but it does work if you click ‘Can’t find your product. Search ......’ and follow through the categories to find ILCE-7M3.

It’s several steps through Sony’s categories! Cameras -> Digital Cameras -> Interchangeable Lens Cameras -> E-Mount Cameras -> ILCE 7 Series -> ILCE-7M3 but it gets your camera registered.