I have a US model
MA2 and a US version of the DJI Fly App (V1.1.6). With both of these the ADS-B works in Australia. I regularly receive messages that an aircraft is nearby, and can then open up the ADS-B map to see where the aircraft is compared with my drone. However, when I updated the DJI Fly App to V1.1.9 in Australia, the option to turn ON/Off ADS-B has disappeared. So I only use the US DJI Fly V1.1.6 App. However, the time will come when a newer version of DJI Fly App has to many features that I cant ignore.