Agree with both of you, it shouldnt be left hanging in the wind like that, but tape only if it cant be re installed.
Sometimes hits like that pop the bumper out of the retainer but nothing breaks. Pretty sure at least 1 bumper pin is missing which should also be replaced to help keep it secure.
And try to do it in a heated garage if possible. If its not broken now, it could be trying to push it back into the retainer if its super cold.