Do not see an hdr option in settings for this model
HDR is automatically enabled when you start playing HDR content via native apps.
For gaming, in accordance with the HGiG (HDR Gaming Interest Group) standard, it sets the optimal image quality for HDR games according to the brightness information of the contents.
When HDR sources are input in Game Mode, this menu is activated (Settings > General > External Device Manager> Game Mode Settings/Game HDR).
For external devices, expand the reception range of the corresponding HDMI input signal in Input Signal Plus (Settings > General > External Device Manager > Input Signal Plus).