New Files App on iPhone Showing 0 Files
You probably need to enable iCloud Drive in order to showcase the iCloud Drive files and folders.


  On your iPhone, iPad, and iPod touch 
  
  
  Go to Settings > [your name]. 
  Tap iCloud. 
  Swipe to turn on iCloud Drive. 
  
  
  You can find your iCloud Drive files in the Files app.
  
  After you set up iCloud Drive, any documents that you've already
  stored in iCloud are automatically moved to iCloud Drive. Your iPhone,
  iPad, iPod touch, and iCloud.com keep your files in the Files app in
  addition to the Pages, Numbers, and Keynote apps. If you don't see
  your files in these apps, they might be on a device that doesn't have
  iCloud Drive turned on (or under a different Apple ID).


Set up iCloud Drive - https://support.apple.com/en-us/HT204025