After searching the on-line Kia parts merchants for OEM trailer hitches, I see some are listing the second version of the trailer hitch, part S9F61-AU002, as discontinued. Others have it discounted to $350 to $375 plus shipping so wondering if this part number is in the process of being replaced and they are getting rid of them from inventory. The parts guy at our local Kia dealership said they still had 60 of them in the Dallas warehouse. He also said that all their wiring harnesses had been recalled, Kia was inspecting them to sort out the problematic ones before restocking, and that moisture contamination in the fuse box of the hitch wiring harness is what caused the recall. He was unsure if S9F61-AU002 was being discontinued.
It almost seems like you can buy S9F61-AU002 and install it on a 2023, modify the center panel like Joespara did, or leave it open until the new factory one is available.