It is on the iPad. However, on your phone, if you ask Siri what time it is, she will respond and show you a clockface identical to the clock on the iPad (the SBB design). This is different that the design in the iPhone Clock app.
Interesting. If they bothered to put it in at all, why did they put it in the most pointless place? Why would I ask Siri the time when I can clearly see it on my home screen or lock screen? I wish this was the clock used in the Clock app as well. It is a beautiful design.