What is the best way to search for Sydney to Dallas award space on Qantas website?

I don’t mind what airline but would like to get business class if possible. I’m Gold FF. How far out can I search for departure in October 2023.
Any help greatly appreciated.!

Have tried looking 330 days ahead of now just for practice…but can’t seem to find any…just hoping I am searching correctly.

I am Platinum and can search 354 days ahead. I can see a handful of business class seats available at around that time.