Save the photo and then make your phone wallpaper as that image. Here are the backgrounds and which phones they work on: Mobile Phone Background 1 which works for: iPhone 12 Pro Max, iPhone 13 Pro ...

Take it out of its case too: that helps cool it down. If you've got a bag, put your phone in your bag, which is shady. It will take you a little longer to get it back out, like 5 seconds more ...