2021 LEXUS NX Structurebody Problems

While driving our Lexus on 8/13/2023 on the interstate under normal driving conditions ALL of our warning lights came on one after another. We also lost air conditioning and power brakes it seemed. We immediately exited and pulled over. Opened the hood and the engine caught fire and fully engulfed the engine compartment. From the time of the first warning light to the vehicle being engulfed was probably 5 - 7 minutes. The vehicle was deemed a total loss. We filed a product liability claim with Lexus/Toyota and they investigated the vehicle on or around 8/28/2023 and were not able to determine a cause of the fire. Because they could not determine a cause our claim was denied. Our car was perfectly maintained and only had 15,000 miles on it at the time of the fire. We bought this vehicle new almost two years to the day of the fire...