How to fix horizontal black line on iPhone 11 screen after updating to iOS 18.4.1?

I am facing the same issue on my iPhone 11. I updated it to the latest IOS a few days ago and I realized this horizontal tiny line on the screen yesterday. As I speak it has stretched to both ends of the screen. What is happening.

I can see one tiny black line near to my battery icon and i have updated to ios 18.4.1 and from next day its displaying like this please help me to fix it

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