This post is from the WWDC26 StoreKit, In-App Purchase, and App Store Server API Q&A.
Is there any way to get the Campaign Token and the app sources, website sources, sources where the user is downloaded the app inside app using any APIs or Can we add this information along with the App Transaction or via some new API?
This will help us to track the actual usage inside the app for each campaign and where from the app is downloaded (source) and position our app experiments better.
We do have one for Search Attribution similarly we can add for this it will be more useful for us developers