Rear tailgate camera redo after repair?

Hey Taco world,
I bought a ‘21 Taco and I didn’t notice it u til I got it home but it’s got a small dent next to the V6 badge on the right hand side next to the edge. Not on it but close. Took it to local Toyota body shop and they did an estimate of $937 bucks. Well, what puzzled me was on the estimate it states they have to do some re-normalizing of the camera?? What the hell is that?? It says ( In-proc repair scan) What the hell is this it costs $129.95. Now I worked for Benz in Alabama as a Line supervisor and was part of the first 30 hired here in BAMA, so I ain’t that mechanically deficient, but come on, you take the battery loose and then when ya done hook it back up and it should be good to go right?? Cause I kno it’s not communicating with anything with the battery disconnected? Anyone kno anything I’d appreciate it!