Comment 3 for bug 1730736

apport uses the dpkg database to determine if a package is official. In your description we can see that apt does not know where the package was installed from.

$ apt-cache policy systemd
systemd:
  Installed: 234-2ubuntu12.1
  Candidate: 234-2ubuntu12.1
  Version table:
 *** 234-2ubuntu12.1 100
        100 /var/lib/dpkg/status
     234-2ubuntu12 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64

This is why apport would not file a bug and said that it was not an official package.