How do I access originator end game after tutorial bosses?

I’ve killed all three originator bosses, my atlas has those petal decorations. I get originator maps dropping, but after three days of T16 mapping I have not had any access to the originator memory threads and I have no quest status for it. How do I access the memory threads and bosses again? Many thanks

I have the same question...

I don't think it shows as a quest. I think Eagon just shows up at random and same with the map drops. Could be wrong though, I'm still trying to learn it myself.