I don't think you earn the status bonus when flying with VA's partners, unless its with a VA flight code/number.
I fly with VA's partner (A)NZ a lot, both whY and J, and have not ever had a PS bonus while flying with an NZ code on the BP.
I do as above confirmed, get the status bonus on Australian dom flights, but you only get the bonus flying VA flights.
If that EY flight carried a VA flight number, presumabally you would get the bonus, on a miles flown basis, (but if it was purely an EY flight, you get the miles flown calculation, no bonus and not per $ spent calculation.
Edit: just had a look, flew SYD-AKL with an NZ flight code/number in J, got 2684 VA FF points, 2x1342 miles, and no PS status bonus. Got 60 SC out of it.