Looks like Android first, then iOS to follow. Not sure if location restricted to begin with.
Google Maps 10.30 prepares to add new features for Electric Vehicles
Google Maps 10.30 prepares to let you pay for EV charging and find compatible plugs
Late last year, Google updated Maps to show nearby electric vehicle charging stations. Maps will show you information about the business where the EV charging station is located, what kind and how many ports are available, the charging speeds, and other information including reviews, photos, and more. Charging station information is pulled from Tesla, Chargepoint, SemaConnect, EVgo, Blink, Chargemaster, Pod Point, and Chargefox. While these services provide Google Maps a huge number of EV charging stations to show on the map, the driver still needs to use a separate app to pay for charging. That could change in the near future, however, as Google Maps 10.30 for Android has added strings that suggest it will support making payments straight from the app.
Google Maps 10.30 prepares to add new features for Electric Vehicles