2022 BMW 5 Series Air Bags

We were involved in a car accident. We were traveling through a traffic circle. The other car that was entering the circle failed to yield or even slow down and hit my car. The rear passenger side door was hit. I was driving and thrown into the driver door and my hip is injured. My son was riding in the back seat behind the driver and he was knocked into the window and was knocked unconscious. I was wondering why the side airbags did not deploy. I reported this to my local dealer who sent me an article about side airbags. There were no warnings or indications anything was wrong with any of the systems. It is a 2022 model car.