When you create a flow that uses Salesforce Marketing Cloud as the data source, you can transfer the following data objects from your Marketing Cloud account:
Activity
Bounce Event
Click Event
Content Area
Data Extension
Forwarded Email Event
Forwarded Email OptInEvent
Link
Link Send
List
List Subscriber
Not Sent Event
Open Event
Send
Sent Event
Subscriber
Survey Event
Unsub Event
Audit Events
Campaigns
Interactions
Content Assets