Iphone 11 pro max Telephoto camera is not working properly

In my iPhone 11 pro max, I am facing an issue with the Telephoto lens. When I was in photo mode on the camera app then switched from 1x to 2x the phone has to use the telephoto lens to achieve 2x in the camera app. instead it is using the software optical zoom to make 2x zoom. Please can you look into this issue. let me know if you need more details on this bug in the camera app.