Unfortunately, no, Subnautica 2's early access will only be available on PC and Xbox consoles. At the time of writing, there is no confirmation of Subnautica 2 coming to either the PS5 or Nintendo Switch 2. That being said, given that the original game was released on both Sony and Nintendo's platforms, there's a good chance that it will arrive at some point in the future. In terms of timelines and release dates, though, nothing has been confirmed.
Here's When Subnautica 2 Early Access Releases in Your Region on May 14… Because Nintendo was defending against infringement claims in that dispute, and because the settlement terms were not publicly disclosed, the timing and posture of the BlackBerry patent case make it a stronger candidate for Nintendo's newly reported litigation expenses than its still-pending Palwor… …
… Even so, the case remains active, and Nintendo has continued filing activity around patent families connected to the dispute. …
… The early access release comes after a drawn-out legal dispute between developer Unknown World Entertainment and publisher Krafton . …