[15] On 28 January 2018, Robinson was selected to the New Zealand team for the PyeongChang 2018 Olympic Winter Games, alongside alpine racers Adam Barwood and Willis Feasey.

[17] On 27 August 2018, Robinson won the Audi Quattro Winter Games NZ FIS Australia New Zealand Cup (ANC) Giant slalom.

[20] On 9 February, at aged 17, she won the European Cup giant slalom in Berchtesgaden, Germany, becoming the first New Zealand athlete to do so since Claudia Riegler in 2001.

[21] At the World Championships at Åre in Sweden in February, at age 17, she won the U21 category and was 17th in the giant slalom, having the fastest time in the second run.

[26] Five days later, Robinson competed at the World Cup finals giant slalom held in Grandvalira Soldeu, Andorra.

Chris Knight and Jeff Fergus formed the International Ski Racing Academy in 2018 and are now Robinson's full-time coaches.

Knight and Fergus previously coached the United States women's team, which included four-time overall World Cup champion Lindsey Vonn.

On 28 August, Robinson won two Australia New Zealand Cup (ANC) super-G races held at Coronet Peak.

[37] On 26 October 2019, Robinson gained her first World Cup win on the Rettenbach glacier in Sölden, Austria, 0.06 seconds ahead of runner-up Shiffrin.

This was the first World Cup victory in any discipline for a New Zealander in over 22 years, since Claudia Riegler in February 1997,[38] and the first-ever in women's giant slalom.

[43] She became the first teenager in 32 years to win multiple giant slaloms in a single World Cup season, last done by Mateja Svet in 1988.

[44] On 18 February, Robinson became the joint world number one ranked skier in women's giant slalom, alongside Federica Brignone, Shiffrin, and Vlhova.