Air Bubble Tempered Glass Screen Protector. These can occur at any stage from installation to years down the road. The best way to get rid of this small bubble.
Then clean ur phone with alcohol solution even a body spray would do and then try applying the protector. When you use a tempered glass screen protector for your phone you will notice it is easier to install with fewer chances of having air bubbles. The best way to get rid of this small bubble.
Bubbles are formed due to the Lint Tiny White Fiber or dust particles.
Make sure there is no excess oil on your cotton swab. First see if they are really air bubbles or if there is dust between the protector and the screen. If the adhesive is no longer sticking based on the pics you posted you may need to remove lightly wash the adhesive portion with dish soap water then re-apply if it is even possible to remove the glass protector without breaking it. When you purchase the ActionPie screen protector it comes with the glass guide stickers a cleaning kit that includes two wipes a dust absorber and a microfiber cloth.