I also made a custom version for M8S+ devices, which based on the Demetris' source:
GitHub - dtechsrv/LibreELEC.tv: 'Just enough OS' for Kodi for OTT M8S+ TV boxes
(Compiled LE image for M8S+: Releases · dtechsrv/LibreELEC.tv · GitHub)
Maybe my source repo is usable for Eny M8S (n200) devices too, because I also replaced the kernel version to another one.
The original kernel was unbootable on my M8S+ device, because it encountered a problem with NAND flash pins.
This is a legacy LE v9.0.2 build with Kodi 18.2, because later versions from Kodi (18.3+) have a very strange issue with Simple IPTV client (very slow channel change, about 8-10 seconds), and I cannot find the correct patches for this issue. Maybe it exists, because on AlexELEC doesn't have this issue with newer Kodis, but sadly Alex cannot update his sources on GitHub.
I also have an M8S device (n200C_2G, PCB: CS_812M8_V1.3), and it works with same meson8m2_KII.dtb.
The only thing I had to replace was the remote.conf, but I also patched the LE's remote-config script, so it loads remote.conf from /flash too.
I tried to solve the power issue, because my M8S's uboot cannot turn on via IR remote control. So now it goes to suspend instead of power off state.