When I ordered the running boards at the dealer when we bought the van (with hands-free) off the lot, I got a call a few days later that Chrysler was refusing to ship them because I had hands free. After some back and forth, they were installed but they turned off the option in U-connect. There is at least one thread about this that mentions the sensors are "exposed" due to the running board installation, but that was not mentioned to me -- they just said you can't reach far enough under the van with your foot to activate -- something that the thread seems to contradict. From other threads, they relocate the rear sensors to the side when a hitch is installed. But this looks like a very weird snafu.
If the option is not installed, U-Connect may sense that so it won't display an option, but that sure does NOT explain the "hands-free liftgate and sliding doors are available" you have seen. I have never seen any such display related to the feature, and the liftgate hands-free is still functional.
When did you get this 2017 and is new or used?
2017 Pacifica Touring L Plus
Build date Oct 2016 - Delivered 11/30/16