@danfro is significative that users only have issues with the app back button, but not with any other ones that are in the same position (menu in TELEports for example).
The camera issue that you are could be solved with the proposition I did for the terrible design that is the notch thing. But I can't be sure as I don't know the model.
Here also comes handy to be able to use the device upside down like the Poco.
Also, let's remember that UT is not thought for mobiles, but for all devices.
