It was a brand new model back then, so barely any used market inventory was available.
Supply chain issues and inflation are way off compared to 2021-2023 period. So, demand isn't as high as it was during those times, which means there are more Broncos available to buyers in both new and used...
Have you asked the dealership that sold you the car to contact the original owner and see if they have the code?
Usually, it would be in the same pouch as the owner's manual and warranty papers.