@Mike_Hunt
'cause the Gamecard Lotus3 is a fully standalone, non-crackable ASIC, which is 'a separate chip on the motherboard responsible for communicating' with the game cartridge.
It is the 'Tegra's SDMMC2 device on the Switch and FS communicates with it using a custom protocol based on vendor specific MMC commands'.
So, it's heavily crypted and there's no explotis, too. That's why there're no any flash cards, at all.