To watch V8 Supercars Championship in NZ on 7Plus, you will need a VPN. The need for a VPN is necessary because of geo-restrictions.
To watch AFL live in NZ on 7Plus, you will need to subscribe to a VPN, login, and then choose Australian server.
To watch 7Plus in NZ, tune into a VPN and connect to Australian server. Now go to 7Plus and watch in New Zealand.