Yes, is available on the Nintendo Switch both as a digital download from the Nintendo eShop and as a physical edition. An "NSP" (Nintendo Submission Package) refers to the standard file format for these digital games and their updates on the Switch platform. OMORI on Nintendo Switch: Overview
The .nsp file format is used to store Nintendo Switch games, primarily for use with unofficial firmware (CFW) or emulators (like Ryujinx or Yuzu). While emulation itself is a legal gray area, distributing or downloading copyrighted game files (ROMs/NSPs) without owning a license constitutes piracy. omori switch nsp