It appears as though it would move back up with a few smacks of a plastic mallet. But why did it move in the first place and perhaps that should be addressed first when possible evidence and a final repair can be made.
No obvious signs as to why it moved in the first place. The screws for the overhead piece are intact and tight and the caulk around the entire frame is intact as well.
Scheduled with the dealer to fix while it's under warranty , unfortunately that's not til December.