Hello! I'm looking at a flight AKL-MEL on a B787. Cash price ~200 USD for coach. Biz cash fare is ~600 USD.

I'm a star alliance gold member via AC; no status on ANZ.

What are are my pathways to upgrade on ANZ assuming I book coach? Do they offer any cash upgrades near to departure or day of departure? Or is there a bidding program?

Thanks in advance!