LG TV Browser playing in 1920x1070

LG TV Browser playing in 1920x1070

Currently on a free subscription playing around with Yodeck. Currently displaying the screen on my LG TV's browser. It updates perfectly, but it seems it has low resolution. Normally it should auto detect, but is there a way to change this to 4K? As I don't see the option, maybe it's a subscription thing?

Thanks a lot!