Xcode scheme run actions have support for a "StoreKit Configuration file" entry, which is a local file that is either managed manually or synced automatically from App Store Connect. It can be used for StoreKit testing inside of Xcode. It seems like all that's required for this is a child element of the LaunchAction with an identifier indicating a path (if relative, to the scheme file itself) to the location of a .storekit file in the project. The .storekit file should otherwise not have any target membership.

<StoreKitConfigurationFileReference
   identifier = "../../Project/Configuration.storekit">
</StoreKitConfigurationFileReference>

Prior art:

• https://developer.apple.com/documentation/xcode/setting-up-storekit-testing-in-xcode
• Add support for StoreKitConfigurationFileReference tuist/XcodeProj#573

Mainly creating this ticket as a marker so I can contribute this.