Navigate to the folder listed below, and check if the missing files are available. When you use Adobe's file sync functionality, the contents of the Creative Cloud user folder are synced to your Creative Cloud account. Files missing online could still be available locally.
C:\Users\<User name>\Creative Cloud Files
Mac HD/Users/<User name>/Creative Cloud Files
This folder isn't present in all cases. <User name> is the user name of the current user.
If you were unsuccessful in locating your files and didn't accidentally delete them, contact Adobe Support for assistance.