This is our kernel defconfig https://github.com/LibreELEC/Libr…nux.x86_64.conf
Fibre NICs aren't a thing among our domestic userbase, hence there's probably little/no info on the topic, but that ^ file is where to cross-reference the NIC driver that's required for a specific device and whether it's enabled by default or would need to be enabled to work. Some NICs may also require firmware blobs but that can always be solved by dropping things in /storage/.config/firmware folders so they are overlaid on /usr/lib/firmware on next boot.