Prius C - Exhaust Gas Heat exchanger??

I know the early Prius had a vacuum cylinder to keep coolant warm, and I understood they now use exhaust heat exchanger to warm up the coolant.

Having looked under my Yaris HSD, I noticed there didn't appear to be anything like that on my car - so I'm wondering. does the Prius C have such a device??

I found the following picture somewhere which I believe is a Prius C and clearly shows a heat exchanger on the right, immediately after the Cat convertor...

P'raps its just something for the US market or for colder parts of the world??