I noticed that, too. I think the angles are such that it wouldn't be visible from this perspective. The steps are there. (Although I could swear there's another set of steps just across from the "Urbo" entrance. May have to take a detour down there tomorrow to satisfy my curiosity.)
The platform is there, just not quite visible because the upper floor is obstructing it. But you can see the bottom of the platform next to the accessible ramp.
