Used an ANZ Rewards card of mine online with Australia Post in the past week. Transaction has posted but there's just nothing in the points statement on the ANZ Rewards site (not even a '0', just like it doesn't exist). So it seems it's not just ANZ FF cards that are affected, but also ANZ Rewards cards too (the ones you can convert to VA/SQ/CX).
That sucks. Was about the only thing I had been using my ANZ Rewards card for in Australia, as it otherwise only gets used overseas for no international transaction fees (on the Travel Adventures flavour of card). Hadn't noticed anything on the statement to advise the change, but TBH I never look too closely and just pay the amount showing in the app, haha.