In the past, on Android Auto when searching for a destination, the parking locations nearby used to show up. Now after an update sometime back (don't know if it is a Waze update or Android Auto update), this is no longer the case. Instead, you have to start navigating to your destination and then Search>Categories>Parking to see this.

And to make it weird, the behaviour here is a hit and miss, with most of the times when this is selected, it returns a 'No Items' message (especially if I am logged in to my account)