I have the LG G7 EAW modell, but now I have G710EM firmware. I remember having options to choose in developer options for resolution bitrate and aspect ratio for hdmi output only on Hong Kong firmware. In this European firmware I have not those options. Maybe you want to convert to eaw firmware.
L. E. It was lg G710EAW Indian firmware. Not Hong Kong.
L. E. It was lg G710EAW Indian firmware. Not Hong Kong.