Need an option to assign Learners to an offering from course "learners" page

Summary:

We are moving to a managed training solution through the Oracle OLC LMS.
We've started implementing initiative-based course assignments to ensure we cover all role-based training systematically - therefore all learners due training are systematically enrolled at course level.
While we can deploy Employee Self Service to some of our courses and staff, many of our courses are managed and training is assigned through the Training Specialist. Our Frontline staff are not meant to use ESS as they need to be scheduled on training, so this needs to be done by a Learning Specialist.

PROBLEM: There is no positive way to assign learners that have a course assignment and e.g. a recurrent due date, to an upcoming classroom offering session.