Apple TV 4K: How to Stream Audio From Your TV's Inputs to HomePod (eARC) - MacRumors
The New 2021 Apple TV 4K (2nd gen) adds eARC support for the discontinued HomePod - The Tape Drive
Amazon.com: Amazon Basics 4K HDMI to HDMI and Audio (RCA Stereo or Spdif) Extractor Converter (Supports Apple TV, Fire TV and Blue-Ray Players), Black : Electronics
Apple TV 4K (2021) review: much better remote, slightly faster box - The Verge
HDMI ARC/eARC: the one-cable TV audio tech fully explained | Digital Trends
Refurbished Apple TV 4K 64GB (3rd Generation) Wi-Fi - Apple