Well I'm pleased to say that I was able to use my ANZ free flights this month and had a really nice trip! (Although more so because of the destinations than the VA experience, which was mediocre.)
One of my tickets was CBR-ADL-CBR, and I nested a ADL-ASP-ADL trip in the middle of that using the second set of free flights. Much to my surprise, I was able to take all of the flights as scheduled and wasn't affected by border closures.
My lounge passes did arrive before the trip (not that I would've needed them anyway as I now have Velocity Gold), but the lounges in CBR and ADL are still closed (and ASP closed permanently). I might give the lounge passes away at some point.