Air New Zealand Air Points - When does NZ releases summer business inventory?

I have been trying to book a couple of business class tickets on Air NZ either from LAX, SFO or YVR to AKL in June-August. Using the ANA tool I have not been able to find any -nor the agents at M&M or MP.

Is there any advice on when (and how) would it be best to look for these tickets on this routes?

They are likely gone already (except maybe YVR). USA to/from NZ in business class often sells out in paid full fares. Many times I've had to fly Qantas on this route as NZ totally sold out even paid full fare, and other times even cancel my trip.

You need to look as soon as they are released (11 months out), and again closer to departure (if a large booking gets cancelled at short notice some more awards may be released).

YVR is a new route (first flight last Friday, which yours truly was on) and so may not be as well known and still some award availability? (Note I haven't checked this.) Downside is flight is only 2-3 times a week.