Worked for me. Downloaded the app, clicked on the deal link at OzB,(ozbargain.com.au) spun the wheel, then added something to my cart on desktop. Got A$5 off A$60 spend. I'm not an Australian resident but I do have an Australian address saved on my account.
Answer correctly to claim. You are just a step away from your prize.
What is the Amazon membership program called? - Prime
Spin the Wheel is open to residents of Australia aged 18 years or older who are invited by Amazon to play (either by direct marketing or displaying the game on Amazon.com.au or the Amazon app)
The prizes consist of a discount coupon with a total discount value of up to 20% or a promotional credit with a total value of up to $20, to be used on a future eligible purchase.
The coupon or promotional credit can be used on a future eligible order which is a purchase on Amazon.com.au of any item sold and shipped by Amazon AU and includes products sold by third party sellers including Amazon US, Amazon UK, Amazon Japan, or Amazon Germany. The coupon or promotional credit cannot be used on clothing apparel, alcohol, digital purchases such as e-books, subscriptions such as Prime video and audible, gift cards and postage or delivery rates.
If you are successful, you have 30 days to use the coupon or promotional credit.
A lot of "TEMU copycat" yarns over on OzB