Get aspect ratio of AR Foundation Feed?

Hello everyone, i am looking to get the accurate aspect ratio of the camera feed, but the returned frame does not return the values i expect.

My iPhone 11 Pro Max reports that the resolution is 1920x1440, which is fine for the image, but it does not represent how i need the image to look when wanting to save it or present it in a custom way.

How can i reliably get the intended aspect ratio of how the frame is supposed to be presented?

The following code only returns the resolution of the AR feed in an unscaled format:

Code (CSharp):

1.  
2. // Get the latest frame and print the size
3. XRCpuImage frame;
4. while(!_cameraManager.TryAcquireLatestCpuImage(out frame))
5.      await Task.Delay(50);
6.          
7. Debug.Log(frame.width);
8. Debug.Log(frame.height);
9.  

A visualization of the issue:

Frame returned straight from AR Foundation:


Same frame scaled to 16:9:

 

Still haven't found a solution to this, anyone?