I was sure I heard him speak as they were riding towards the city. But anything is possible with this show. I will laugh out loud if you are eventually proved right.
He had to have spoken at some point between the Twins and King’s Landing even if we didn’t see it. That’s a long ride!
Besides, Jaime can’t be dead, he’s still got plot armor. You don’t kill a character who is only halfway through a redemption arc, that’s writing 101.