Yuzu supports .XCI (cartridge dumps) and .NSP (eShop downloads).
The Ultimate Guide to Switch ROMs for Yuzu: Navigation, Legality, and Setup switch roms for yuzu link
The journey was not without its hurdles. Echo encountered various obstacles, from dodgy download links to ROMs that simply wouldn't work with Yuzu. Frustration began to set in, but Echo persevered, fueled by the promise of a superior gaming experience. Yuzu supports
Projects like Lan-Play (a VPN tunneling service) can trick Yuzu Link into thinking two PCs across the globe are on the same local network. Here is how to use that with your ROMs: but Echo persevered