How to force restart my iPhone 11?

If your iPhone 11 is not responding, and you can’t turn it off or on, you can try forcing it to restart.

To force restart your iPhone 11, press and quickly release the volume up button (on the left side of your device), press and quickly release the volume down button (on the left side of your device), then press and hold the Side button (on the right side of your device). When the Apple logo appears, release the button.