With a recent update to the Soapbox Donations for Salesforce packages, we've added support for Enhanced Recurring Donations in the Salesforce Nonprofit Success Pack. Enhanced Recurring Donations is an optional upgrade to the standard Recurring Donations functionality in Salesforce. For more details on Enhanced Recurring Donations in Salesforce, see this article from Salesforce.
This addition requires an update to your installed Soapbox Donations for Salesforce managed package to the latest version. To do so, follow this link. To review the current version of all Soapbox for Salesforce packages, check out How Do I Manage My Soapbox Engage Packages in Salesforce?