Access Sourcing Command Center Duty is not appearing for custom job role

Summary:

Duty role which is required to enable sourcing command centre is not appearing to select on custom role which is having permission group enabled.

Content (please ensure you mask any confidential information):

Could some one please help me on this one? Thanks

Version (include the version you are using, if applicable):

26B Version

Code Snippet (add any code snippets that support your topic, if applicable):