I made the mistake of porting to Dodo while overseas, and found that they don't support international roaming. I have a local sim, so am just looking for a barebones plan that I can receive SMS on; while redirecting calls to my local (new zealand) sim.
Ideally with an eSim so I can port away from dodo quickly and regain the ability to receive calls / messages.
Don't really care for the international "day rate" roaming price.. only the monthly access component. Don't plan on receiving roaming calls using my .au number; just forwarding them from Australia.
Try vodafone or amaysim($10) pay-as-you-go plan. Amaysim has an esim and $10 to keep it active for a year. You can receive SMS internationally and can purchase plan accordingly.