App Wrapping is described here: Capsule Workspace App Wrapping
It states explicitly:
The application owner must supply a binary of the app(s) for the wrapping process. In most in-house apps, the customer is also the application owner. If public 3rd-party app is needed, the vendor approval is required.
Which generally means you're working with internal versions of the app (e.g. unsigned or ad-hoc signed ones).
I would not expect the process to work for App Store (Apple, Google) signed versions of applications.