Look at the three minute mark on the attached video. This guy did an excellent analysis.
https://www.youtube.com/watch?v=XzBKCt8-uWg
Watched it. Good analysis. Shutting down the wrong engine could explain loss of hydraulics, but not being able to manually drop the landing gear because they didn’t have time ? I don’t know. With both engines out and no flaps/slats deployed they must have been losing altitude quickly..but there are two crew members in the cockpit. You don’t need both to fly the plane at the same time. Guess we will find out.