So the rules have changed since Weemac's birth.
Do you need NZ citizenship to play for the AWs/FFs?
I imagine the other qualifier is residency?
But 4 months or so living in NZ (that's if Mandi & whanau return to Spain) - as an infant I'm guessing would not be enough.
Speculation to another level - working out if Mandi junior can qualify for 2039 AWs/FFs!
I think for FIFA, birthright applies regardless.
Eligibility is one thing, but you also need to be able to submit a passport from the country of the national federation that you're representing, and you can't do that if you don't have the citizenship.