In the past I have had the insurance company try to bone me.
I was T-boned on a test drive. I had recently completed a ton of maintenance: tires, brakes, rotors, pads, fluid flush, new aluminum radiator, timing belt, pullies, water pump, plugs, the list goes on.
None of that was reimbursed. I was literally test driving things to make sure everything was back together and got hit.

The insurance company tried to lowball the hell out of me.

I went to the adjuster with photos as well as receipts, and with current pricing from websites for the components that were damaged that added value to the vehicle.
I then found vehicles with comparable mileage for sale at the actual time the claim was being adjusted.
I finally lawyered up due to personal injuries.
I ended up having the shop where I was getting an estimate hold the vehicle until I could come by and pull off EVERYTHING I could that the insurance company would not cover.
I wish you luck. The insurance company is there to NOT pay you, or to pay as little as possible. Keep that in mind.