Yes, I’ll work out some kind of kludge that lets you go with Wolfbait to glimpse the source of the Xaos-Storms, etc.
Oversees the administration of a province. Coordinates the work of the Hegemonic institutions and mediates between them in the event of clashing priorities. Keeps the indigenous nobility in line and bought into the system. Appoints aristarchs and judges their performance. Reports back to the Ennearchs. It’s a big, big job–not at all ceremonial.
As for a CKII mod, my answer is the same as it was for Rimworld: