Xiaomi Mi A1 - 2x Camera not available.

The camera is lacking the 2x optical zoom.

Summary

When selecting the camera app, a x2 zoom option should be available as the phone has two cameras. This is available just next to the take-shot button in the default AndroidOne OS. However, no such option is available on screen or in the various menus. There is a digital zoom option but this isn't relevant, I would like to be able to use both camera options.

Steps to reproduce

Open the default camera app in /e/ OS. -No x2 zoom available-.

What is the current behavior?

No use of the x2 telephoto lens.

What is the expected correct behavior?

There should be a button, next to the take-shot button, that gives the option to select the x2 telephoto camera and therefore providing optical zoom.