You're looking for an update link for the Nintendo Switch NSP (NSP stands for Nintendo Submission Package, but in this context, it seems you're referring to the game package for the Nintendo Switch) version of DOOM (2016).
DOOM, developed by id Software and published by Bethesda Softworks, was initially released in 2016 for PC, PlayStation 4, and Xbox One. It later came to Nintendo Switch in 2017. doom 2016 switch nsp update link
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