Document Completed Notification is not sent to additional recipients when offer approval or job requisition approval has completed.
SAP SuccessFactors Recruiting Management
This is a known defect. We will fix it as part of the 2H 2021 release (b2111).
KB article 2521176 - SuccessFactors Releases | Deployment schedule for 2021
Offer approval, job requisition approval, Document Completed Notification, email, additional recipients , KBA , LOD-SF-RCM-EML , Recruiting Emails and Notifications , Known Error