Its not that the airbags deployed that totals the vehicle. It's the cost of replacing all them that adds up and is calculated vs. The actual value of the vehicle .... age, mileage, etc.
In a side impact you have the roof curtain and seat airbags. The labor to replace them and the exterior damage. Add all that vs. The current value of the truck. That decides total or not.
Years ago on my parents Aerostar the van had frame damage. Got hit in the rear and pushed it into another car in the front. The vehicles unibody frame bowed upwards in the middle. Buckled the side panels and of course the front and rear damaged bumpers, fenders, etc.......
All this and they still did not total it. Even though we felt like it should be.
They paid like 12,000 for the van used. Had it 4 months got it. The estimated damage was 7,000. They said no total.