Hi, I can answer your question.
I've had this same problem before and tried to glue the lever, but it would never hold.
Unfortunately, the level cannot be fixed. If you can, try to move the level in the place it needs to be by using a small screwdriver to lock it in place.
Otherwise, you can try to check if your printer is under warranty for a replacement part. Which may end up being much more than just the lever, but the part it belongs to.