I think that you may be combining two different systems , but I haven’t looked it up – it will tell you on the VW website, forgive me if I have misunderstood?
I have lane keeping assist on my Tiguan, which ‘helps’ to keep the car within the lane, but is not a hands free system , and if there is only light pressure , or no pressure on the steering wheel, for a about 13 seconds, it will tell you to put your hands back on and take over the steering again – it is not a hands free system .
It certainly helps with lane keeping, but is not a replacement for your steering input.
The other system , detects if you have fallen asleep etc and keeps the vehicle in the lane bringing it safely to a stop – this was a factory fitted extra for about £400 i think, in 2018 .
Regards