I use CarPlay a lot. For navigation I use either Google Maps or Waze (or both). Because they are both from Google I used to close them (swipe them up from the open app list) after I disconnect my phone from the car to reduce their spying activities.
I recently installed iOS 13 and it introduced a concept of using different app on the phone screen and different app on the car screen. So now after getting out of the car I don't see them in the open app list even if I used them when driving.
And here's the question: are they not running anymore? Is there a different way to force-quit them? And does quitting them actually change anything?