This is a gold 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:
The Royal Australian Mint’s 2022 Gold Proof Year Set is the benchmark in numismatic quality and attention to detail. This stunning set of six beautifully manufactured coins, struck in pure gold, features Australia’s iconic circulating designs. Each is enhanced with a unique frosted and polished finish, bring its beauty to glittering life.