There are two ladders marked with the objective of “Extend the ladders”. They are alredy quite low and easy to climb. There is no marker on the ladder glowing red for me and when I climb to the top, I do not see any way to interact with the ladder to drop it down. What are you supposed to do here?
You might not have used Odins vision or something? There should be two metal clamps in the middle of the ladders that will drop them down when you shoot. They will turn red when you hover over them with your bow. Shoot these and the ladders will fall down.