We absolutely have international trade.
Ask Fisher & Paykel Healthcare.
You lucky holders of FPH shares over last several years.
https://www.stuff.co.nz/business/121971708/fisher--paykel-healthcare-profits-up-37-on-back-of-covid19
Dairy Exports are up , for period 1st feb to 26th June
2020 7.6B , 2019 6.86B ,2018 6.29B
Meat Exports up a little, during restrictions running at lower capacity to space workers out safely.
Note meatworks worldwide, Germany, France, USA, Australia, Canada have been vulnerable to outbreaks.
2020 4.26B, 2019 4.17B, 2018 3.84B
Seafood did take a hit Covid hit Lobster season, high value China trade smaller.
2020 0.687B 2019 0.871B, 2018 0.731B
Forestry, China stopped taking logs for a while, though slope of graph has recovered.
2020 1.78B 2019 2.44B, 2018 2.3B
Fruit did well, exceptional effort getting harvests in, in difficult circumstances.
2020 2.4B 2019 2.15B, 2018 1.92B
Non-Food Manufactured Goods. Long term trend of NZ manufacturing in decline unfortunately.
2020 5.23B 2019 5.49B, 2018 5.8B
I suppose services which a lot of technology and IT businesses are in don't fit in here so are somewhere else ?
https://www.stats.govt.nz/experimental/covid-19-data-portal?tab=Economic&category=Trade&indicator=Exports%20by%20country%20(values)
Edit, tidy formatting