Rooting the Root k50 gaming edition or Poco F4 GT is very easy, see this video for those interested, with automatic subtitles.
Files in the description.
Worked fine with 13.0.8 but with 13.0.9 i'm getting a lot of system app FC's.
Do I need a different boot.img?
Edit:
I've patched boot img from 13.0.9 ROM, but it's seems that I need a clean flash, what's very annoying now, because I don't have root to backup my app data.