Kyran did not say anything throughout the briefing with Oceanus and his people. Since they would only scout the location and find a route to get closer to the portal, they did not need to have an in-depth discussion about the members of The Council staying in their camp.
They also mentioned the possibility of a High Sovereign's presence overseeing the area so they could stay on their guard and act accordingly in case they encountered her or him.
After the briefing, Kyran went back to his room while the others gathered in the dining hall for dinner. Oceanus invited him, but he declined, saying that he wanted to rest early.
Oceanus did not insist because he more or less guessed that Kyran wanted to read and review the information Maren distributed during the briefing. For this, Oceanus admired Kyran's attitude. On the other hand, he felt a little disappointed that Cove and Irving chose to improve their relationship with his daughter.