Hello francoisfromtheblock,
We understand that you’re unable to add your vehicle as an electric vehicle in the Maps app to take advantage of the EV Routing feature introduced with iOS 14. You may need to check with your vehicle manufacturer to determine if the app currently supports electric vehicle routing for your model, as not all do.
After downloading the compatible app for your vehicle and following the setup instructions in that app then launch the Maps app on your iOS device. Tap the “i” at the top right. Do you see the option for “My Vehicles.”? If so, tap “Connect Your Electric Vehicles.” Select your vehicle, then follow the onscreen instructions.
Let us know, during that process, where things are differing for you.