https://techcrunch.com/2021/04/07/apple-app-tracking-transparency-details/

Apple is sharing more details today about its upcoming App Tracking Transparency feature, which will allow users to control, on an app-by-app level, whether their data is shared for ad-targeting purposes.

In a sense, anyone using the current version of iOS can see App Tracking Transparency in action, since iOS already includes a Tracking menu in the Privacy settings, and some apps have already started asking users for permission to track them.