That’s a great game to mod or create a custom feature for. Since Super Robot Wars V on Switch already has DLC and updates included in many NSP/XCI releases, an would need to go beyond what’s officially offered—either as a romhack, save editor add-on, or a fan-made patch.
An is a Nintendo Submission Package. This is the format used for digital downloads from the Nintendo eShop. Super Robot Wars V Switch NSP XCI -DLC Update-