I’m in NZ. Theoretically we’re listed as each other’s primary emergency contacts, so that shouldn’t be an issue. I just hope we never have to find out.
As for children, property etc. NZ has this idea of a defacto relationship, which you can enter into either by living together for 2 years, or by having a child together. It offers the same protections that marriage does. I think it gets a bit greyer if you just have a child together, but living together for 2 years is as good as a marriage in this regard.
Where it matters the most is if one of us passes away, but that can be negated through a will.
It could matter if we ever decided to move out of the country, but I don’t see us doing that in a hurry. We’ll cross that bridge if we ever get to it
Ye, the medical thing concerns me. NZ has a national health record system that let’s you register a primary emergency contact. From everything I’ve read, that, coupled with the fact that we’re in a defacto relationship should be enough to prevent that being an issue. I hope that stays untested