I would take a punt that VA and even QF/JQ cancelations major reason for cancelations is not to consolidate it would be more than likely be crewing/staffing issues with COVID. Even if you’re a close contact you can not attend as a pilot/cabin crew that’s at JQ anyway that is the rule.
Rex only have 6 jets and is pretty much at capacity with their SY flights as they don’t have slots and can not transfer their SAAB slots for 73 use. Rex will need to start getting creative maybe WLM instead of SY. Also their J class might be full but means nothing when it is offered as a free upgrade on a $100 economy ticket, I know first hand, so that would make it a loss making seat.