Thanks for the reply.
Wouldn't it be possible to unpack the ISO, make changes (copy the nvram configs), then compile the ISO and use that ISO to install new LibreELEC on my Mini PC?
Proceed at your own risk:
copy the SYSTEM file from the LE system partition to a linux box, then
run fakeroot, then run unsquashfs SYSTEM to extract the SYSTEM squashfs image to squashfs-root, then modify files in the extracted dir, then run mksquashfs squashfs-root SYSTEM -comp lz4 to create the SYSTEM squashfs file with the modified content and copy that over to the LE system partition.
so long,
Hias