The safest and most stable way to play Nexomon is through the Nintendo eShop .
We have to address the elephant in the room. The keyword “nexomon switch nsp update eshop work” implies a search for a free, pirated version that updates properly.
When a standard user buys Nexomon from the Nintendo eShop, the console automatically downloads the latest patch (e.g., Version 1.0.3 or higher). When a CFW user downloads a base .NSP (Nintendo Submission Package) file, they often need to manually source the separately.
Nexomon Switch NSP Update: eShop Compatibility and Installation Guide