The shared link is to supernotes.app rather than the specific card. Using the share button within the share drop down in iOS. I’m using iOS 14.4.
Thanks for the bug report Daniel. After further investigation it seems like the “copy link” button in the iOS sharing card uses the correct link, but when you try to share via apps, the shared link reverts to
supernotes.app. We are looking into this more and will push a fix in a new minor update.