[CooperCGN]

I don't know about the previous generations but on my LG OLED E6 from 2016 'Real Cinema' is automatically activated when I playback 24p content and greyed out in the settings menu. Real Cinema switches the display to 120Hz so that basically every frame is displayed five times. (120/5=24)

Also make sure that the Kodi player settings switch the panel on start/stop of the movie, otherwise it will use your regular desktop settings which might be 60Hz. FWIW my TV also automatically turns 3D mode on and off on playback start/stop.