For eARC, both a standard HDMI Cable with Ethernet and a high-speed HDMI Cable with Ethernet will work, according to HDMI Licensing. Even though many existing high-speed HDMI cables will work fine ...
Cables marked "Standard HDMI Cable with Ethernet" or "High Speed HDMI Cable with Ethernet" will also work, but don't support as many video resolutions as Ultra High Speed, which could be important ...
This standard offers a maximum bandwidth of 80Gbps, which HDMI 2.2 would supercede and allow for audio and ethernet to come over the same cable.