Binary package “pinentry-qt4” in ubuntu bionic

Qt-based PIN or pass-phrase entry dialog for GnuPG (transitional dummy package)

 Pinentry is a program for secure entry of PINs and passphrases, from
 the GnuPG project.
 .
 This package installs a symbolic link from pinentry-qt4 to
 pinentry-qt. You should switch to using pinentry-qt instead.