Spot on the camera screen

Dear,

I bought this phone in January this year in California. Two months ago, my sister showed me the small gray spot which is visible on the screen when you turn on camera on her phone. Last week she showed me one more smaller gray spot on the screen (her mobile is iPhone X and it was bought last year in California). Today, the same thing is happening to me. I turned on my mobile (iPhone XS Max), press on the camera to make a photo and there was the same gray spot on the screen like on the phone from my sister). I do not know what is happening, the spot is very annoying and frustrating. When I make a picture or record a video the spot is there on the photo. Horrible. Me and my sister bought these mobiles because iPhone has really good camera and we wanted to make great photos but we cannot do that because of the spot. I would really like you to help us with this problem because it is obviously not our fault. My phone is just less than year old. I will be in December in Miami and I can come to Apple store if you want to help me with this problem. I am sending you the photo with the spot.

Kind regards,

Din Švraka