You cannot modify an encrypted IPA. To decrypt, you need a jailbroken iOS device.
The world of iOS customization often centers on the "IPA mod repack," a process that bridges the gap between Apple’s restrictive ecosystem and user desire for enhanced functionality. An IPA (iOS App Store Package) is the standard archive format for iOS applications, containing the binary, resources, and metadata required for an app to run. While these files are typically delivered via the App Store, "mod repacks" involve modifying the internal contents of an IPA to add features, remove advertisements, or unlock premium content before resigning and redistributing the file. The Anatomy of a Mod Repack ios ipa mod repack
optool install -c load -p "@executable_path/MyTweak.dylib" -t MyApp.app/MyApp You cannot modify an encrypted IPA