I have a 2016 cutaway and have seen a TSB/repair procedure on door hinges breaking where attached to door frame. If the wind catches the door, it will pull out the bolts, hence the extra strap.
That photo ask a hundred questions, can you fill in the blanks like is it oem, aftermarket, who makes it, consumer or fleet order. Did this van go to an up fitter before you saw it.
It is an OEM part. No additional options on the window sticker for it. Only on drivers side. We are a fleet buyer as we modify the vans and then resell them. These particular vans have the rear cargo lights which look like they were factory installed. Rather than the dealer installed ones. This was delivered directly to us from the factory but went through a local dealer for a PDI.