There’s a genuine Chicony certified charger with a AU plug but for whatever reason not available on iFixit (which sells ones with US/UK/EU plugs in those region).

The charger made by Chicony is AU certified (checked the EESS ERAC database) but not available to buy on iFixit AU store which sells the charger in other regions like on the US store for the US.

Wish Valve could partner with JB Hi-Fi instead of EB Games (their past partner) to sell the Deck locally.