Thanks for the question Jack. Only laws that change the Australian Constitution are added to the Constitution. Such a change can only be made if Australians agree in a referendum. A proposed change must be approved by the Australian Parliament before it can be put to the Australian people.
All Australian laws, including changes to the Constitution, are listed on the Federal Register of Legislation.
The Parliament House website lists all the bills—proposed laws—that have been introduced into the Australian Parliament since 1996. By searching this list you will be able to discover information about each bill.