Hi, Thanks for reply. what I meant here was I drag ''n' dropped app into Privacy & Security - Full Disk Access section. On my dev box this seems to allow the app to quicklook files on the file system (tried a lot of home sub folders including Dropbox, downloads, documents etc) - except for iCloud Drive. I can also see the extension in the Privacy & Security - Extension - Added extensions section in settings and the quick look preview is enabled there. I was able to get Xcode cloud going and created a test flight build. Upon downloading this to another Mac I can open fit files in the app to view but not use the QuickLook feature. I added app to the Full Disk access section but it is not showing under Added extensions. Thanks Ants

OK this was because one of the packages uses bluetooth and the privacy entry was not in the info plist.