Enoch knows Thrawn is married. He accidentally let that fact slip once only once after years stranded on Peridea.
But that's all he knows. He doesn't know who or when or where or where they are now. But he knows that Thrawn loved them.
When they return to the original Galaxy Enoch can't say he's surprised when Thrawn immediately beelines it to the unknown regions.
He is surprised when the man who greets Thrawn when they land is human. But he doesn't question for a moment that that is Thrawn's husband













