A Python-based tool like CDNSP can directly download and repack games, updates, and DLCs from Nintendo's servers into an NSP format.
: Unlocks bonus content, items, and cosmetic options. Mary Skelter 2 ROM NSP UPDATE DLC - Switch Game
For the Switch version, the main update of note is the one that ensures compatibility with the free Mary Skelter: Nightmares DLC and includes minor quality-of-life improvements. A Python-based tool like CDNSP can directly download