Tutorial on obtaining depth data from iPhone cameras

I’ve been trying to find a tutorial on ways to obtain metadata (specifically depth data) from the iPhones TrueDepth Camera.

Tutorials like this one below, show how to visualize depth data but do not show how to actually obtain the depth data values.
Image Depth Maps Tutorial for iOS: Getting Started

do you guys provide a tutorial that goes over this, and if not would you be making a tutorial like this in the future??