Rear Main Camera Replacement, Not working

I have a S20 FE model: SM-G780G that was completly smashed.

Replaced the Display + frame, moved over all small components from old frame to new one. Put in a new battery and a new back cover. Boot up the phone and do the diagnostic via *#0*#. Everything works except the rear main camera. There are some big spots on the sensor but the camera works. I ordered a new camera partnumber: GH96-13921A.

I install the new camera, open the camera app. Warning! Camera no working.

I install the old camera, No warnings, camera work but got spots in the picture.

Ordered another camera from a different supplier. Installed it and got the same error message.

Is the Rear Main camera paired to the motherboard? How can i pair a new camera?