Unknown part

As of now, there is no fix for this issue. It would be best to have it looked at by Apple. It has happened to many users with no official word on the cause of the problem or if it can be fixed with a software update.

iPhone Repair & Service - Apple Support

Make an appointment at the Genius Bar of your local Apple Store. That would indicate a hardware failure.

Ok, we have just been seeing a lot of them lately in the newer phone models. It reminded of other apparent hardware issues that were fixed with a software update. In any case, the solution is to schedule a service appointment with the supplied link.

iOS 16.0.2

• Addresses an issue where touch input was unresponsive on some iPhone X, iPhone XR, and iPhone 11 displays after being serviced

iOS 16.3

• Fixes an issue where horizontal lines may temporarily appear while waking up iPhone 14 Pro Max

iOS 14.01

• Addresses an issue that could prevent camera previews from displaying on iPhone 7 and iPhone 7 Plus
• Fixes an issue that could prevent your iPhone from connecting to Wi-Fi networks

iOS 13.6.1

• Fixes a thermal management issue that caused some displays to exhibit a green tint

iOS 13.1.2

• Fixes an issue where Camera may not work

It's a hardware problem.