I'm not getting much better than that on my 2018 TH with a mix of about 50/50 HWY/CITY. However, back later last year I got the drivetrain software updated to fix the transmission's many bumpy shifts and hesitant, early upshifting behaviour. The update made the vehicle much more livable, but immediately the fuel consumption went up by about 1L/100km on average. So now, it gets about the same economy as my 2015 2.4L Cherokee TH (which I wish I had've kept), but it does drive much better. It was almost dangerous before, as it commonly stumbled on pulling out onto a road or intersection, leaving me in the way of oncoming traffic.
So, it's possible your vehicle may just have the updated software from the factory.