When you link your Ad Manager network with a Google Analytics 4 property, your Analytics app data from that property becomes available in your Ad Manager reports.
Your Ad Manager revenue data will be available in the Monetization > Publisher ads reports and the Explorations workspace in your Google Analytics 4 property.
You create the link from Ad Manager. Learn more
Once you establish the link, it is listed in Analytics under Admin > Property column > Product Linking > Ad Manager. Analytics users with the Editor role are able to delete the link.
Other product configurations
You need to have:
Link your Google Analytics 4 property to that Firebase project so that your app data appears in Analytics.