well, good news at least, Same Chromebook HP 11 G5
Downloaded the Nightlybuild
LibreELEC-Generic-legacy.x86_64-11.0-nightly-20220617-b78941a.img.gz
Selecting the PULSE:Default, Bluetooth Audio (PULSEAUDIO ) , paired my AirPods,
we now have sound.
Rebooted, and confirmed BT Audio works,
So decided to check the other options again,
I also Have sound via HDMI now using: ALSA:HDA Intel PCH, HKX HKC TV on HDMI #2