DJI Mavic 3 with DJI RC no video out

Why did you buy that package without researching it?

I should have done, but even after i did not find any information that there was no facility to use an external device

Just use Litchi and program waypoints on the PC with the same account ?

Mavic 3 pro wont connect to litchi, i got a DJI n1 and its so much better, i can use DJI fly app on my iPad, so much easier