Safari stopped working on iPhone 12
Suddenly Safari doesn't open any more on my iPhone 12; all I get is a blank white screen. All other apps work fine. Turning iPhone off and on doesn't help.
iPhone 12
Try a forced restart.
• Press and quickly release the volume up button
• Press and quickly release the volume down button
• Press and hold the side button.
• When the Apple logo appears, release the button.
Force restart iPhone - Apple Support (IN)