Your content sends users to an app store. Where does your web attribution end?

Map the observable boundaries explicitly. A web click to an app-store destination is not itself an install or a purchase. Use the attribution mechanisms your app and distribution setup actually support, and keep their limitations visible.

Do not join events solely because they happened close together. If the identity link is unavailable, report the outbound interest and the separate business outcome without inventing a user-level connection. The measurement plan should fit the real path rather than the chart the team wishes it had.