Australia has two mints, the Royal Australian Mint (which also makes the country's circulating coinage) and the Perth Mint, which are both very active in the bullion coinage space; coins issued by them are legal tender.
Additionally, there are private issuers of bullion which is not legal tender and is targeted at investors and not at coin collectors - such as this one.
This gold cast bar is part of the Perth Mint's large range of bullion products.
The mint says about it:
These 99.99% bullion cast bars are offered in a convenient choice of weights and are stamped with The Perth Mint's London Bullion Market Association (LBMA) registered mark, a symbol of international tradability.
As of the 24 April 2023, the identification stamps have been re-styled by significantly increasing the size of The Perth Mint's Swan logo. | 
Search for Australia: Gold Kilo (2023) Perth Mint Cast Bar on eBay 
