Once you have access to duplicate functionality you can duplicate an app in “Work” section as well a

[sunkireddykrish]

Once you have access to duplicate functionality you can duplicate an app in “Work” section as well as duplicate a published app in a “Stream” to “Work” section. When “Power User” duplicates app from a Stream unable to see “Data load editor” for the app in “Work” area. “How to activate “Data load editor” once an app is duplicated from published “Stream” to “Work” section.”

[Vicky_Z]

It may not be relevant to that “Power User” role as I tested with it and I still see data load editor in my duplicate app. 

Do you have multi-node? You may need to check the node purpose:

Qlik Sense Data Load Editor button not visible

https://support.qlik.com/articles/000068540