A second round defeat in Saarbrücken was the biggest achievement of Kuivenhoven's 2018.

In January 2019, he entered PDC European Q-School attempting to win a two-year Tour Card.

He finished seventh on the Order of Merit to win the final card available and seal at least two years on the PDC ProTour.

In 2020, Kuivenhoven reached the quarterfinals of the 2020 European Darts Grand Prix before losing to Ian White.

At the end of 2022, Kuivenhoven was outside the top 64 of the Order of Merit but immediately regained his Tour Card at Q-School in January 2023.