Request to Add WhoId Field for Salesforce & Clay Integration Issues

Hey Support, I'm working with Salesforce <> Clay integration. I want link rows in Clay (contacts) to their matching Activity History (Salesforce Object) so that I can reference past SFDC activity within Clay on each contact. However, the necessary field "WhoId" which matches the ActivityHistory record to the contact is not available in Clay. A couple asks:

Can you add the WhoId field to the Activity History lookup dropdown so I can access it in Clay?
What workarounds are there?

Thank you!