The latest smartphones are equipped with multiple cameras so for photographers they are a bit like having a DSLR with interchangeable lenses. I just acquired one with telephoto and ultrawide lenses in addition to the default wide lens. With the PRO mode of the phone's built-in camera app, it is perfectly possible to select a lens/camera and capture RAW files (DNG format) for editing later in Lightroom. However with the camera included in Lighroom Mobile, you can only use one default lens. To fully exploit the phone hardware and the nice features of the Lightroom camera, it would be really good to be able to select any one of the available physical cameras/lenses.
I appreciate that this might mean manufacturer-specifice code in Lightroom but it could be worth exploring what is possible to enhance the interest of the Lightroom camera with the latest phones.
[I only have experience of Android phones but I have tagged this post for iPhone as well, assuming it is relevant.]