I understand what you are saying now. DJI does not publish this information, perhaps for proprietary reasons. The only way to simplify your process as you wish would be to create a LUT for your camera to make it match as closely as possible the DJI output. as long as you like the DJI output. This out can then easily be applied to all shots from that camera without a lot of trouble.
This entire process is not as simple as it seems on the surface. I shoot with MA1 Cinema D, Mavic Adv, Panasonic UG-180, and Nikon FL. They do not match particularly well. Black level, Gamma, Black Gamma, Knee, saturation, colorphase all play a part, although color phase is less useful as most LUTs work with color temperature and g-magenta adjustments. The only thing that has worked at all is to pick a single color space definition, and adjust all the cameras video to match in that color space. Theoretically this should work well, but in practice it doesn't. I end up individually grading shots anyway to make them "match".
The problem appears to be in 2 areas. One is that none the sensor's basic color responses match exactly. The second, and more problematic, is that exposure differences between the cameras whose shots you want to match throw any standard adjustment off. Anything having to do with the tone response -Black level, Gamma, Black Gamma, Knee all change visually significantly with exposure.
Let me know if you find a solution that works.
By the way, this problem exists in all areas of critical video production, not with drones only. Multicamera shooting is common, with the need to match shots across the same action shot with different cameras. Depending on your standards around the result, the only easy solution is shooting with identically matched same model cameras.