The batteries are behind a seat row, the stuff in the seat is strapped in, the loose stuff is in the pass front foot well per OSHA guidelines (I figure most here worship at that altar). It'll be fine. They're not tracking the minivan.
I know that every time something like this is posted everyone likes to swoop in and talk about how X or Y is unsafe and you need eye protection every time you pick up a screwdriver and fall protection every time you even glance sideways at a step ladder because that's a way to score easy virtue points but it just comes across as tone deaf posturing. They aren't driving the van around like this 40hr a week for an entire career likewise it is not reasonable to expect them to implement a tie down solution that scales to that level.