You will often find links on:

“Graveyard Keeper v1.4.0 + 4 DLCs NSP download”

The Graveyard Keeper community is active and creative, with many fans developing their own mods, levels, and content for the game. You can find community-created content on platforms like:

You can use "Swiss Army Knife" (SAC) on PC to combine the base game and updates into a single file before transferring.

Ensure you have all the content to fully experience the game: How to Merge Secret Console Games with Updates and DLC

For those unfamiliar with gaming terminology, NSP and ROM are file formats used for Nintendo Switch and other console games.