Turn off your iPhone 11 or iPhone 12
You’ll feel a haptic vibration and then see the power slider on the top of your screen, as well as a Medical ID and an Emergency SOS slider near the bottom. Slide the power switch from left to right and your phone will power off.
Additionally, How do I force restart my iPhone 12?
To force restart iPhone X, iPhone XS, iPhone XR, iPhone 11, iPhone 12, or iPhone 13, do the following: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the side button. When the Apple logo appears, release the button.