Yes, I changed permission for viewing users download attachment. And can the username Admin see viewing user download attachment of all user?
You can allow user admin to see downloaded attachment users by granting permission (only) for admin user Users > User permissions
Viewing logs button will be appeared when you have permission to view it. Please check the screenshot at https://brivium.com/resources/who-viewed-this-attachment.228/ to understand how it works. Regards,