after update i am getting pink dot in iphone 15

I am having pink dot in iPhone 15 back camera . While in image as well as in video.

Can any one help this so that I can work on it. Even if my iphone 15 is only 5 month old and having under warranty still they are denying for cover. There is not a single scratch nothing happen in my iPhone. Still this type of camera iPhone company is providing of 1 lakh Rupees phone your buying. I think 20 to 30 phone better enough instead of iPhone