Err… Based on my experience prior to AGS included Australia as part of the countries listed I used to use VPN when I created alt account and set my country in US I can see the packages (Bronze, silver, etc) on steam which means it’s playable.
When I turned off my VPN and changed back to Australia it showed message "Sorry your country not supported bla bla bla
TLDR: Unsupported countries should be able to play the game with VPN.
Will Steam ban the account? Possibly hence creating alt account
There should be video on YouTube explaining how to do this.