Hi Nick
It just so happened that i stumbled uppon a comment of yours mentioning that, so i did exactly that (the only difference being that i did it by renaming and copying the files from the Libreelec github instead of just renaming them) and it worked!.
I was even able to flash it to the EMMC with no issues at the moment, the only thing is that the tv box seems to power on randomly after a couple of secconds or gives power to the usb after a while, but i thing that is not related to armbian.
Im planning to use it for klipper so it was amazing being able to make it work, you are amazing, really appreciate you man!