There are dozens of EV charging adapters available today from a wide variety of suppliers. Unfortunately, they are necessary because there are a few different connectors used depending on the manufacturer and the power that is being supplied to the EV.
Tesla has always walked to its own beat and uses a proprietary connector that only Tesla vehicles are equipped with. That's not necessarily because it wanted to be unique, it's really because when Tesla started making EVs there wasn't an established standard connector, so Tesla was forced to make its own.
