Radio signals of Literadio 2 SE ELRS not detected in Mission Planner

Hello everyone,
I have installed the latest stable version of “ArduRover” on “Holybro Kakute H7 Mini v1.3”.
I’ve tried all the settings given by the manufacturer and the Ardupilot document but I couldn’t get it to work.
I tried all the settings given by the manufacturer and the Ardupilot document but I could not detect the radio signal in the mission planner from my “Literadio 2 SE ELRS” with the “ELRS Nano Receiver”.

My “ELRS Nano Receiver” is connected to the FC’s UART1.

The settings I’ve made are as follows

   SERIAL1_PROTOCOL = 23
   RSSI_TYPE = 3
   RC_OPTIONS = 512 // Suppress CRSF mode/rate message for ELRS systems
   RC_PROTOCOLS = 512 //CRSF
   MODE_CH = 12

21? Don’t you mean 23?

Yeah, i have set 23, the error it’s juste in my message.

Sorry to bump a dead thread, but did you ever get this working?