There is no official "Prototype 2" application on the Nintendo eShop. If you are searching for this title, you may encounter different products or similar-sounding names: PROTOTYPE (Publisher):

Installing Prototype 2 on the Nintendo Switch is a deceptively simple process: insert the card or download from eShop, ensure enough free space, and wait. Yet beneath that simplicity lies a story of technical compromise, platform economics, and the evolving definition of “ownership.” For the player, the reward is the ability to unleash James Heller’s chaos anywhere—on a subway, in a waiting room, or on a living room TV. The installation, whether digital or physical, is the necessary toll. And in an era where game sizes balloon to 100 GB on other consoles, Prototype 2 ’s modest 8 GB install feels almost nostalgic. It is a reminder that even the most bombastic, violent sandbox can be tamed to fit inside a microSD card, ready to install with a few button presses. The process may lack spectacle, but the result—a portable apocalypse—is anything but ordinary.