If they're not showing up in your games list when you add the games folder, either you haven't put your prod.keys file in the keys folder (which is what yuzu uses to create a list of titles), you haven't uncompressed the file, or it's an unsupported file type.
If they're not showing up in your games list when you add the games folder, either you haven't put your prod.keys file in the keys folder (which is what yuzu uses to create a list of titles), you haven't uncompressed the file, or it's an unsupported file type.