It's a valid scenarion. It's probably also possible with this: GitHub - mindspank/architeqt: A inheritance engine for Qlik Sense. However it is not at this time native functionality of Qlik Sense. If you want to use Qlik Sense only without using architeqt then you can only duplicate apps, assign them a new owner and let the new owner modify them. You can't copy selected sheets of an app to other apps.