Can’t edit, but you are right 2 degrees specifically list Hotspotting included as a benefit of their plans

https://www.2degrees.nz/mobile-plans/pay-monthly

Maybe it’s just the high limit plans.

When we travelled there in 2022 and needed to work remote, there was no plan over 50gb that didn’t charge a huge amount to allow hotspots. Not sure about lower data plans though as we didn’t look at them

And New Zealand