I mean, I'm not saying it absolutely can't be. But even the cheapest cables are so-called "high-speed" cables. There's not really a special cable just for HDMI 2.0 data, it's all just data to the cable. All that's required is that it can throughput all of it, hence "high speed."Well I can't get a picture when I turn HDR on, even if plugged directly to the TV. I'll try to mess with the settings but I was pretty sure it has to be the cable?
Cnet has a decent article on it: https://www.cnet.com/news/what-hdmi-cable-should-i-buy/