Opt-in questions with the type “Opt-in Confirmation” (CQS transactions) are not available to be exported to from RE to EN using the connector. Only QCB opt-in transactions appear.

Engaging Networks have implied that this link should help . https://speca.io/engagingnetworks/engaging-network-services?key=726cda99f0551ef286486bb847f5fb5d#add-or-update-supporter . The name in the REST API is Double Opt-in. The type is CONF