There is a way to read the link to download the enterprise from the application (but I'm sure you are not asking the code to download and read the file) , but there is no way to display something different in the application, based on the parameter on the index page or manifest file, without changing IPA
Unfortunately, the installed application does not know the manifest file or index page from which it was loaded.
EDIT with links / sources
This link in the section “Exporting your application for testing outside the application store”: Exporting your application for testing (iOS, watchOS) discusses the manifest files, but does not mention any data chain from the web deployment in the application.
I also turned to a senior Apple adviser who confirmed that there is no mechanism that provides the App with any knowledge of where the application was installed.
Sheamus
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