Every Volkswagen car that I know of comes from the factory with the inner hatch/trunk mounted lights set to work only as marker lights at night. Lighting up for brakes is limited to the outer lights.
I have seen posts on various forums that US DOT regulations prohibit brake lights on any movable part of the car (eg https://www.reddit.com/r/cars/commen...their/dk25ffg/ )
However that is clearly not true because Audi vehicles have the hatch mounted lights set to work as brake lights. I saw an Audi A6 that did this and thought it was modded, so I asked on the local Euro car group and they said it's standard for all Audis.
So I believe the regulations allow the hatch lights as long as there are also body mounted brake lights. So why would Volkswagen choose to disable 2 out of 5 brake lights for Volkswagen branded cars specifically? Why not retain the added safety of a broader illuminated area like they do with Audi models?