What is the shortest focus distance of iPhone 15 Camera?

I’ve just realised that the focusing distance is 10-15cm on my iPhone 15’s camera. This doesn’t seem to me logical because this distance is much more than distance of iphone 11’s cam. I’m closing the objects and after the distance of 10-15cm, the picture is becoming blurry and this situation is not getting better. I’ve wonder my phone’s cam has a problem or not. Please help me.. Is there anyone who has the same problem? What is the shortest focusing distance of iPhone 15 camera?