After my dealer told me that even though Kia doesn't offer a hitch for a bike rack we can certainly have a third party like UHaul install one on my Niro PHEV. I can confirm that UHaul will NOT install a hitch and I have found no one who will. Since I don't want a roof bike rack I am looking at the SuperBones3 rack to mount on the tailgate. I have seen some photos posted on other threads that make me think it will work.
2018 Kia Niro PHEV EX Premium - Aurora Black