FYI, I am using FuboTV, a mibox S and a Vizio 4k tv (M55, 2017 model) and I am getting the superbowl broadcast in 4k (yes I know it's upscaled) and HLG HDR!!!!

I didn't know the mi box S supported HLG, but I knew some of the vizios did....and was pleasantly surprised when it popped up on the info bar!