From past experience if the vans loaded it’s less of a problem with a bit weight hanging off the back, with a light van it can be the tail wagging the dog, had a Honda quad on the back once, was interesting with an empty van, ton pallet in the side door was no problem. VW recommendation for max ball weight is safety related which is quite often ignored...
Rear B6 shocks for vans are specificity rated for heavy trailer loads and a good idea for vans at max weight, although a bit harsh when empty.
If traveling further afield Germany can be a problem with something hanging off the back if the police have nothing better to do, if it’s TÜV it’s normally OK although they may drag you to a weigh bridge, also saw signs last year directing everything over 2,800 kg to a weigh bridge and they will check if you have the correct tyre load rating.
It all depends on what’s flavor of the day, last year in northern Spain saw police stopping van, tape measure out to check the overhang, on the spot fine...
Sorry to be a killjoy, it’s just how it is, you should try taking a truck overseas, it’s just everyday life.