Think that I’ve managed to build Coreelec based on the 19.2 release but with the truehd fix backported. It took me a while as I’ve never built CE before so I was unfamiliar with GitHub too.
Unfortunately I have had time to test it yet. Will do so in the next 24 hours.
Basically I forked Coreelec and CE version of xbmc and Modified both of them. It should work. It’s been a good day learning experience.