Why are my journey email tracking statistics not being synced?
Tracking history from Campaign Monitors' journeys flows back into Salesforce via our email tracking object. It sits alongside tracking data from mass emails. There is a type of field that shows if the record is from a mass email or a journey.
Also, we surface journey data in Salesforce via a Lightning component. This method is a useful option if Salesforce storage is limited. You can turn off email tracking record creation and instead view it in Salesforce. By not creating records, no storage is used, but it also means you will not be able to create a Salesforce report, but you and your users can view the tracking data. The component also displays email tracking for mass email as well.
This article shows how you can add the component.