@Pippi1 - as far as I'm aware, Airbnb was set up to be non-discriminatory (and many other things) right from its beginning, although you might wish to read their current "Nondiscrimination Policy" (Last updated: January 25th, 2023) - qv Help Centre, Anti-discrimination and accessibility. Community policy; part of which states "The Airbnb community is committed to building a world where people from every background feel welcome and respected, no matter how far they have traveled from home. This commitment rests on two foundational principles that apply both to Airbnb’s hosts and guests: inclusion and respect. Our shared commitment to these principles enables all members of our community to feel welcome on the Airbnb platform no matter who they are, where they come from, how they worship, or whom they love. Airbnb recognizes that some jurisdictions permit, or require, distinctions among individuals based on factors such as national origin, gender, marital status or sexual orientation, and it does not require hosts to violate local laws or take action that may subject them to legal liability. Airbnb will provide additional guidance and adjust this nondiscrimination policy to reflect such permissions and requirements in the jurisdictions where they exist."
I think that if one takes the last sentence of that extract, and contacts Airbnb, it may well be that if what you asked about is actually happening, and if NZ's own laws are anti- or non- discriminatory, then maybe Airbnb will handle such a matter direct with the Hosts.
From your question I'm not too certain whether you have been a Guest within the Hosted property, or whether you might be the, or one of the Host(s), but either way I would suggest that rather than deal with the issue yourself, it should be handled by those who would be best able to clarify Airbnb's policy (ie Airbnb themselves).
Hope the above might help clarify the position.
P.S. please give my love to Auckland, but more especially to New Zealand (I was last there in 1992, but could so easily have settled down there - forever!)