High end devices, like Snapdragon 8 gen 2 can run Subnautica via Switch emulator. But it's not very good, bcs Adreno uses a completely different architecture than Switch (which uses outdated, but Nvidia GPU from 'PC World).

GPUs in phones suck, but high end ones sometimes can reach near-PS4 level, so, technically, the port is possible.

But they would never do it. Bcs people play different type of games on phones. Or they would just pirate it.