When you execute a SAP job from RMJ and this SAP job generate child/spawn job in SAP, by default RMJ will find these sub-job and will be displayed as an SAP_CcmsJob.
When in RMJ does not display any SAP_CcmsJob, this usually means that the parent/child relationships has been disabled.
Preparation / Requirements
1. Submit SAP_Info
2. Check if Parent/Child is enabled in the output as shown in the below screenshot.
3. If not set to "X" or enabled, then child jobs (SAP_CcmsJob) will not be shown and monitor in RMJ.
You can submit SAP_MaintainXbpOptions to enable/disable parent/child relationship.
More information can be found in the documentation:
Enable XBP 2.0 or 3.0 Functionality