Noticed this trying to test some packages on a clean system and scdaemon is optional in ubuntu.
Without scdaemon gpgconf --apply-profile /usr/share/doc/gnupg2/examples/vsnfd.prf fails with
gpgconf: Fehler bei der Ausführung von '/usr/lib/gnupg2/scdaemon': wahrscheinlich nicht installiert
Well. And Kleopatra eats the error. But this is my problem ;-)
Fwiw I think this is minor.