Note that including the learner level and being able to manage it on the Enrolment tab is optional. It can be turned on or off by a developer through a setting in the database (learner_levels_enabled).
Users who have access to Admin > Manage Courses will be able to manage learner levels through the Course Enrolment tab.
Navigate to Admin > Manage Courses/Programs.
Select the appropriate course/program (if applicable).
Click the Enrolment tab.
You will see a list of learners. Use the curriculum period switcher on the right if needed.
Please note that if you store your learner levels in another system and pull them into Elentra, making a change in Elentra will not automatically update data in your other system.