Further to my last:
This is the Australian National Emergency Medal (Gold stripes on Eucalyptus Green) which MAY be used for recognition in Australia. If it does it would then likely be issued with a clasp (i.e. COVID 19).
If the National Emergency Medal does not get authorised for this national emergency, the Australian Defence Force may perhaps look at issuing a dedicated Operational Service Medal (OSM) (with a specific coloured operational ribbon) to their personnel. This would not be the first of its type for domestic operations, as they already exist for Border Protection, Counter Terrorism, and some Special Operations etc.
If their isn't some kind of formal recognition it appears that Australia will end up with a mismatch of some personnel being issued recognition for their efforts and COVID work (either through Oz Day/Birthday Honours (limited few) or internal organisation awards (i.e. police, ambulance, and emergency services medals)), whilst others will not. Ironically for doing the same roles and working together in many cases.