Hi, Australia is in lockdown but we can go to the shops, food, doctors, pharmacy, post office etc. It is starting to relax now, allowed to travel further with more people, more shops open talking about restaurants and bars in June.
I wouldn't worry too much about the delivery other than it is on a slow boat via China!
I am still waiting for a Brodak delivery sent on the 15th of March. According to USPS it went through Chicago international on the 20th nothing since then! Annoying they won't respond to my enquiries.
Australia Post is notorious for, "Turning Off", their tracking so they don't look bad. I had a parcel go missing for 9 days tracked at my local distribution centre, in Brisbane, 10 miles away. Tracking said out for delivery, then 9 days later it turned up in Darwin, 2,133 miles away! Go figure! No tracking info until it turned up at home 10 days later. Hmm how could that be, no tracking???!!! They admitted, in the end, they turned it off and it was a monumental stuff up.
I know it doesn't help you. Your tracking number should work on the USPS tracking site when it hits US soil. Until then AustPost Tracking.
Good luck!!
Craig