What sort of insurance do you think would cover her car?

It wouldn't be WorkCover - it covers injuries in the course of employment - not personal belongings.
The only time they may cover personal belongings in some states is if it was damaged in the course of being injured - eg a ring on a hand that was crushed by a piece of machinery.

Has she asked what sort of insurance they are saying are covering the contents of her car - if not she should ask and call them directly so she has the correct information.