This is a silver proof version of the mint set of Australian circulation coins issued in 2022. Unlike the sets in base metals, it contains the definitive "Aboriginal Elder" $2 coin and not a commemorative.
The Mint says about the set:
This stunning 2022 Fine Silver Proof Year Set comprises six beautifully manufactured fine silver coins featuring Australia’s iconic circulating designs, each enhanced with a unique and striking frosted and polished finish. The Royal Australian Mint has once again set the benchmark in numismatic quality and attention to detail with this stunning release.