Are the List of Values for withdrawn or bypass and completed customizable?

Summary:

We would like to be able to add "waived" to the list of values (LOV's) either at the withdraw status or for bypass and completed. Is this possible?

We have a use case where several learners are assigned a course, through an inititaive, however HR has said they do not need to complete the training due to "time on the job". We thought we could use exempted, however Oracles definition implies that the employee has already completed this training (somewhere), but that might not necesarrily be the case.

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