DNG iphone import on lightroom: dark photos

Upload a sample (use a service like dropbox for the proraw file) to show the problem if you want so people here can take a look but I am pretty sure this is just the raw defaults.

In Classic you need to change the setting in the Settings menu for Raw defaults. Set the Global setting to "camera settings". For new images this will make the proRAW files look more like how they are rendered on your phone. For already imported files hit reset or apply the camera settings preset. Otherwise Lightroom just renders the raw data using the Adobe default which does not apply a profile to make the raw rednering look like what your camera did. proRAW files are not the same as dng shot using the Lightroom app's camera on your phone. proRAW embeds a separate mask that your phone generates that tells Apple apps how to render the data. Lightroom ignores this by default and just renders the raw data plain.