Got one for when i let my young daughter watch Youtube Kids in the car....it turns off bluetooth so my phone doesnt connect to the car stereo, set the volume at the right level then opens the app. Also got one that i used to use more when i had a longer commute to work but it used to first ask if i was going home, to work or to a calendar entry (if it was then it would then check my calendar and show a list of locations for anything in there) then would open Waze then after a few second open Apple Maps and show the route options for my chosen location. Just used to run it when i got in the car and then it would be connected to CarPlay to show on the car screen. Apple Maps would show with Navigation with Waze in the background for any alerts to come through for speed cameras, police, incidents etc.
I have them as buttons in a 4 button widget on my home screen to run them to start with along with a couple of others. One controls the smart bulb in my porch and the other is a sort of quick access phone book thing.