@Rolf 'm afraid I can’t help very much with that issue. I didn’t test any of the sitl funtions yet.
Maybe someone over at Mission Planner on Raspberry Pi 4, no Luck might know more. When I find some time I’ll definitely look into it.
@kerococoec as far as I know, apm planner is basically just downloading, extracting and you’re good to go. Mono should not be needed. It is lighter and running better on a raspberry. That’s true. However you’ll be missing some functions.
Mission planner for example has a “secret” menu hidden under ctrl+f. E.g. to share your gps nmea protocol via bluetooth.
Apm planner does not have that.
I can’t say anything about Qgroundcontrol. Since I did not test it on a raspberry yet.