It was announced earlier this year that Hirakawa will be McLaren's reserve driver in 2024, meaning that we will see him take to the track in at least two practice sessions due to F1 rookie regulations.
With Lando Norris and Oscar Piastri setting the world alight thanks to their excellent performances, there's no guarantee they will stick around at McLaren for their whole careers, particularly if the team can't provide a car capable of winning world championships.