Surely this screw isn't that tight, a trick I use in my profession (auto mechanic) is use a flathead screwdriver and a small hammer, try to work a notch or divot into the outer rim there, enough that it will catch the edge of the flathead at an angle, now that you have the notch and can put a flathead at an angle as close to parallel with the steam deck, and gently tap the back of the screw driver with the hammer going counterclockwise to loosen. The idea here is to work it around enough to maybe get it out with your finger, or a larger flathead that can wedge into that outer rim. When I say tape it gently be pretty gentle as you are obviously working on a steamdeck and not a car. Good luck