Only in Elon Musk's delusional mind does a burned out shell of vehicle quality as mostly intact. You see a burned out ICE vehicle that is still the shape of a car, does that qualify as "mostly intact".
That Cybertruck is completely totaled. For ordinary people, getting parts for a Tesla is a nightmare and insurance companies will total out a Telsa for a ding in the battery pan because nobody wants to be liable for attempting a unit that is designed to be irreparable and is the bulk of the worth of the car.
Fixing that truck would mean stripping it back all the way to the frame and rebuilding it from scratch. That is even assuming the frame hasn't been warped and tempering of the steel fucked by the heat of the fire. The cost will be greater than a new Cybertruck fresh off the line, but Musk's dick riders will declare it a victory.