Update:
I found (Canada) the Orei HD-102 splitter ($20cad) works with CEC and HDCP for my setup which is 1080P.
I have a Pi 3 A+ (1.4GHz) and Pi Zero 2 W (1GHz), is there any system diagnostics within Hyperion, to test performance? See if the Pi 3 A+ is overkill?
Also along those, is there any reason to use an ESP32 or ESP8266? I have both. Can't the Pi run everything? Have 5m (300leds) of sk6812cw.