The screw is replaceable the bracket is not!
First you’ll need to clean the area of the corrosion from the leaked battery. Try some white vinegar using a moistened cotton swab (Q-Tip)
This screw does have a slight head. I would try grabbing the edge of the screw with a pair of pliers which have a serrated jaw. If that fails then you’ll need to cut a slot into the screen head so a straight blade screwdriver can grab the screw.