It won't do you any good with a truck camper if you take off the tailgate. The system uses the front camera, side cameras located under each of the side mirrors, and the rear camera located in the tailgate to generate the 360 degree view. The system generates a graphic "truck" that it places in the center of the cameras that are stitched around the graphic truck to make the 360 degree view. As soon as you take off the tailgate, the system no longer generates a 360 degree view as the rear camera is missing.
With my 2019 F350, the 360 degree view is only available when the truck is in reverse. It's meant to be used to check your distance from other vehicles when parking and if you're centered in a parking space.
