The only evidence I can find of NZ roadshows were from 2018, and it was for group recruitment so Link and JQ (I’d say these were the main targets of any NZ recruiting drive at the time). Haven’t heard of any roadshows this year.
Last I heard was applications for mainline in this latest round of recruitment have far exceeded the number of positions planned to be available (3-4 times as many) so plenty to choose from without needing to perform roadshows.