The Essential Mod is a mod which is a client+ for any modpack and lots youtubers use it when they play, Essential Mod is compatible with many other clients (e.g. Feather Client) and I would prefer Lunar if it was compatible with Essential Mod (it isn't right know).
#Essential Mod Works With Lunar Mods
night yacht
vapid hare
deep oxide
This has been suggested already, and unfortunately I don't think it's something we will support as they are a competitor.