Active Port: analog-output-headphones
You'll need to wait until I have published the latest changes, I don't have enough disk and hosting for more images.
If you have sound in ROMs then you should have sound in Kodi. Make sure that you've selected the correct output in Kodi system settings. Also read page 1, "how to ask support". EDIT: Oh, and LibreELEC-RR was originally based on my package set with the addition of some other frontends AFAIK.