If you have an Xbox account, you can also purchase Subnautica on the Microsoft Store and play it on your PC:

Subnautica is famous for its "Leviathans"—massive, aggressive predators. If you want the wonder without the heart palpitations, you can use the to explore freely. Alternatively, the "invisible" console command can make you undetectable to monsters, though they may still bump into your vehicles. What's Next? If you've already conquered the depths of the first game, Subnautica 2

: Allows you to play on PC and often supports Xbox Play Anywhere , meaning a digital purchase may grant access on both PC and Xbox consoles. PC System Requirements