Standard PCs cannot read encrypted cartridge data.
"The 3DS is a unique system because it has a massive library of digital-only games," notes a moderator of a popular ROM preservation subreddit. "Once the eShop closed, those games vanished from the legal market. Archive.org is the only place keeping many of those 'Digital Deluxe' editions and indie titles alive." archive org 3ds decrypted
: A repository for original, encrypted dumps. Standard PCs cannot read encrypted cartridge data