The F-150 Lightning's towing capacity was recently tested by a Ford dealer in Kentucky. Here it was able to easily move a 17,000 pound load, significantly more than the official rating of 10,000 pounds.
That's what I thought.The questions that come to my head are: does that break warranty? What does that 7k additional load add to the stress of the frame? Ford demoed pulling 1mil* lbs (or was it tons?) but I imagine their 10k rating is just to not add stress on the battery and structure of the vehicle.