Nintendo has announced that it has tweaked the user interface slightly to make it more apparent that you have a game to download if you purchased a Nintendo Switch 2 which comes bundled with a digital game such as Mario Kart World or Pokemon Legends Z-A. There will now be an icon showing that you have a game to download. Previously, you would have needed to know that opening the Nintendo eShop would let you redeem the game.
I purchased the korean version of Mario Kart World Bundle Switch 2, and when I attempted to change the region to download the game, I was unable to do so because it required a korean ID and phone number. This situation does not occur in any other country or region.
Are you by chance from Korea?