Yes. Add your car without a connection: when adding it, choose Maybe later and then enter the details yourself, such as the connector, the battery charge limit and a name.
You will then miss features such as the real-time battery level and automatic charging options, because the app does not receive this data directly from your car.
You can check which car makes and models can be linked on this list.
Keywords:
car not supported | brand does not work | car compatibility | cannot link car | maybe later