I don't have access to the source code but only the .ipa file and I'm to confirm as the QA to the project the swift version used to develop the .ipa file, how do I? I can get the iOS version using this command on the terminal.
plutil -p Payload/MyData.app/Info.plist | grep DTSDKName
I have read through the Info.plist file and can't find any unique identifier that could show the app is built with Swift 5.
These 2 links may provide help:
with eskimo answer:
Was your library compiled in ABI stable mode? That is, with Build Libraries for Distribution (BUILD_LIBRARY_FOR_DISTRIBUTION) set? If so, the .swiftinterface file contains the info you need:
// swift-compiler-version: Apple Swift version 5.3.2 (swiftlang-1200.0.45 clang-1200.0.32.28)
otherwise
h t t p s : / / newbedev. com/how-to-check-the-ios-sdk-version-used-to-compile-ipa-or-app-file
From there you should find the SDK.
From SDK, you will find Xcode release
https://xcodereleases.com/
And hopefully the Swift version.
