This version requires you to use the central rocker controller to switch to the side menu.
Once in navigation, the back up button brings up the command to hit it again to stop navigation, rather than backing up to the Android Auto menu.
You are stuck in Waze unless you move hands from steering wheel.
You should be able to switch to the side Android Auto menu to bring up another app whilst still in navigation and by using the steering wheel buttons like before - exit navigation should be by selecting the X button.
Speed limit alert also gone.
Getting to saved places is also tricky and not intuitive, the big box just has recent places and also covers up ETA etc when reporting a hazard ahead.
Behaviour exactly the same in 2021 TTS and 2018 Q5