iPhone 13 has pink vertical line on right side of screen
I bought my iPhone 13 Pro new about 3 years ago. It has been working fine, until this morning when a bright pink vertical line has appeared along the far right side of the screen. I thought it was from an app not being closed, but it's not. I restarted the phone a few times, but the pink line is still there. I'm fearing that this is the beginning of the screen filling with lines, then dying out! I hope someone can help. Has anyone else had this issue?
iPhone 13 Pro, iOS 18