Probably an oversight somewhere but has anyone seen or witnessed Salesforce Statuses not populating when trying to add them into a Flow. There should be no real reason for them not to show but for some campaigns they are not appearing - and in some - the statuses do but is not the full list?
Are there statuses in the SFDC Campaign?
Is the Program connected to a Campaign?
Sometimes the UI doesn't populate picklists. Try refreshing.