Use Litchi on the Mavic 3 Smartcontroler

Can Someone Help. I installed Litchi via the Amazon Store on the Mavic 3 Smart Controller. But the app does not connect to the drone. I also can’t get a connection via a USB C cable. I have already disconnected the DJI app and always start with the Litchi app.

Both Mavic 3 and RC Pro are not supported yet.