AUSTRALIA KDP
Amazon’s Kindle Direct Publishing (KDP) is finally opening a print-on-demand (POD) facility in Australia, which is great news for authors, small publishers, and Amazon customers in Australia.
The new facility is set to begin its launch on May 19, 2021.
KDP authors should check their paperback pricing options starting on May 12, 2021. On this date, you will be able to check your list price and royalty for Australia, and if necessary, you can adjust the list price for AU. The printing costs are apparently higher in Australia, so you want to make sure that your royalty isn’t zero or very low (if it is, you can adjust the royalty by increasing the list price, if needed).
For authors who live in Australia, the big question is whether or not you will be able to order author copies and proofs printed in Australia. The answer appears to be YES according to the KDP help pages and an answer from KDPSasha on the KDP community forum. (However, unfortunately, authors in Canada currently have their copies printed in the US.)
Write Happy, Be Happy
Chris McMullen
Author of the Improve Your Math Fluency series of math workbooks
chrismcmullen 
My books are on there, including my Werewolf of Oz fantasy travel around Australia to a Wizard of Oz theme, loving visiting cool sounding places like Humpty Doo!
Is there a page number limit. Lulu is 600 per book. I read books with 1100pp.
There is. For most trim sizes and white paper, it is currently 828 pages. Cream paper or standard color is less, and a few trim sizes are also less. The KDP help pages have a printing options chart that tells the page limit for different options. Not all of these options are available for printing in Australia though.