2023 Kia Telluride Equipment Problems

I purchased a 2023 Kia Telluride for a family vacation tow vehicle. Spec's call out 5000 lb towing capacity and "pre-wired" for a trailer. Problem is, pre-wired means a connector in the back of the vehicle, but no actual harness available that plugs into it to run trailer lighting/brakes. Contacted Kia several times, no harnesses, was advised to take it to U-haul and get a splice-in harness. It's a brand new car, I don't want to cut into factory harness. Isn't this false advertisement? Can't tow anything without lights and pre-wiring obviously isn't the case. I thought pre-wired meant you plug your trailer straight into an existing plug. Kia forums also indicate no solution, initially dealers said couple months, couple months. Now, 6 months later, still no OEM harness equipment available.