Secret Circle on back of iPhone 11!

I recently got a new black iPhone 11, and noticed that there is a small, very indiscriminate circle on the back, top right hand corner of my phone, across from the camera, that I can’t find anything about on the Internet I feel like I’m the only person who had noticed this! In fact, I have a light blue iPhone 11 that I used prior to getting my new black iPhone 11 and I looked on that phone to see if I could locate the small circle and it was not there on my other iPhone 11! So now I’m very confused! 🤦‍♀️🤷‍♀️

Make sure to look very closely at the picture. It’s hard to see. And no, it is not an impression on my phone from something else as it cannot be wiped away & is clearly part of the phone….