If you are managing your game files manually on a modded console, the installation order is critical for the game to function properly:

A Switch running Atmosphere is the standard for homebrew installations.

To install the latest version of Pokémon Shield (v1.3.2) along with its DLC on your Nintendo Switch, follow the official procedures below. 1. Install the Base Game and DLC

NSP files can only be installed on a Switch with a custom firmware (CFW) or a homebrew-enabled device.

If you want, I can:

If you are in the game but cannot travel to the armor station, double-check that the DLC NSPs were installed after the 1.3.2 update.