Kodi and Sony TV Bravia: incredible but true

Hi, I’m sorry but I’m so angry. I have a Sony TV TV KD-65X8509C and I bought it to watch 4K video. As I make 4K documentaries and I have so many of them, I installed KODI (latest version 17.3) to manage my 4K videos and to watch them. But I realized I don’t watch them in 4K. In fact, going to the configuration pages I noticed these writings 1920×1080. Look at these pages:

https://www.dropbox.com/s/jepyaoseli415m…9.jpg?dl=0
https://www.dropbox.com/s/9s0s6vltymm9q4…6.jpg?dl=0
https://www.dropbox.com/s/dv27db59161oxs…7.jpg?dl=0

A friend of mine who reads these 4K files and an external reader, on those pages of Kodi reads 3840×2160. Incredible but true! This means that Sony doesn’t allow Kodi to read in 4K. Right?
Some info please?
Thanks