Ugreen HDMI to HDMI Converter with Optical Toslink SPDIF and 3.5mm Stereo Audio Port, Male to Female HDMI Adapter Supports 4K 2K Video 40281 - Newegg.com
HDMI vs. Optical: Which Digital Audio Connection to Use? - CNET
Pure Fiber Ultra High Speed 48Gbps 8K60 HDMI 2.1 Active Optical Cable