I found the difference between HDMI ARC and eARC, and this is what you sh

Connecting soundbars and surround sound systems to a TV has never been easier thanks to modern HDMI ARC and eARC ports. There's no need for specialized optical or coaxial cables, and they have a simple plug and play design that works with a standard HDMI cable.

Source : https://www.pocket-lint.com/i-found-the-difference-between-hdmi-arc-and-earc-and-one-is-clearly-better/