Can I assume that Flight Aware uses ADS B information for tracking? I remember seeing somewhere that Jetgo had an exemption from ADS B fitment, so would that invalidate your assumptions about their activity? Are the repossessions fact?
https://www.casa.gov.au/files/casaex17079pdf Although it does say it was repealed at the end of March 2018. Perhaps there was an extension?
Edit to add: JGB and JGR are both shown on Flightradar24 as having flown today.