I just browsed the article, and missed you make Lunar until this comment.

Fantastic work. Absolutely critical for taming the weirdness of my LG 5K display.

I've been trying to get my LG 5K display to turn on from macOS for like 2 months now. I just downloaded Lunar to try and fix the problem, but nada. I know the monitor works because if I connect an iPad with the same cable, the display works fine. What's your trick?