Google.Places.PlaceType is missing Supermarket. (It has GroceryOrSupermarket, but that is not enough; Places SDK for iOS Place Types contains both supermarket and grocery_or_supermarket.)

An attempt to access the getter for Google.Places.Types where the types include a supermarket causes the getter to throw:

System.NotSupportedException: supermarket has no associated enum value in PlaceType on this platform.

Xamarin.Google.iOS.Places version: 3.7.0.1

This behavior was reported in #271, #296, and #354, all of which have been closed with the request to open a new issue if more information is available. It looks like the link to Google's Place Types docs is the new information you're looking for.