Lack of HDR Game Mode

Hi, (I didn't know where to post this)

I just updated my LG 43UH603V to the firmware update 04.31.00. It is the latest update for this model of TV and it features HDR Game Mode according to the LG Website. However it does not appear as a picture option for me. I am curious as to why this is. I live in Ireland so I suspected it was a regional thing but it is not. If someone could give me a hand with this t would be much appreciated.