Scope of origins in GA4

In GA4 there are 3 scopes for origins (source, medium, etc): Session, user and Event/Advertising. As a result, extractions using these fields present results according to the scope selected, which may differ from what is seen in the interface in some cases. To match the data in the Session Traffic Acquisition reports, fields with the name “session” must be used. Otherwise, the data will differ.

More information on traffic source scopes in GA4

The source, medium and source per medium fields, without the User or Session names, refer to Advertising reports and cannot be combined with some metrics: “On December 1, 2022, updates to Google Analytics 4 introduced incompatibility between a number of dimensions and metrics. Queries that use these fields together after December 1 will not work – read this article to learn how to deal with these changes.”

More information on the Google Analytics Data API

Data differences between reports and analysis in GA4