But socceroos.com.au has daily articles on the Olyroos in Japan, and more.
https://www.socceroos.com.au/
Of course FFA has more resources/money than NZF, but NZ Football's website is still poor. https://www.nzfootball.co.nz/
Even outside of events like the Olympics, their posting of content can be very random. An article on Kiwis Overseas with their club results etc, and then another one 3 months later. It's almost like someone wakes up one day and says shark, lets write up a quick blurb, it's been awhile.
The All Whites FB page is better https://www.facebook.com/AllWhites/
The Football Ferns have a reasonable one as well.