Purchases of Expansion Passes are platform-specific, meaning that players should ensure they make these purchases on their primary platform to ensure they are able to easily access all the content it has to offer.
Players will only be able to access the new lands introduced in Expansion Passes on the platform they have made their purchase on. Some other content from Expansion Passes -- including the use of new Royal Tools, Dreamlight Duties, items, characters, and more -- can still be enjoyed by Expansion Pass owners on other platforms where they own the game but not the Expansion Passes.