I am loving Libreelec more and more:)
I have a Mini M8s box and it worke nice, but for the WAF i would like to use my Harmony remote to control it.
I myself used Kodi a lot with a remote Keyboard.
However the wife does not appriciate that so she always switches to Mediaportal which she can control with the harmony using MCE like functionality
The original remote does only have some basic buttons and she is not very fond of it.
I searched and found a threat on this forum:
https://forum.libreelec.tv/thread-2754.html
This explains it should be possible.
But I get lost in where to put what on the box.