The openSUSE-MicroOS images contain (same as the skelcd):

        <namedCollection name="basesystem"/>
        <package name="patterns-microos-basesystem"/>

        <namedCollection name="microos_defaults"/>
        <package name="patterns-microos-defaults"/>

        <namedCollection name="microos_apparmor"/>
        <package name="patterns-microos-apparmor"/>

        <!-- Needed for initial configuration -->
        <namedCollection name="microos_cloud"/>
        <package name="patterns-microos-cloud"/>

Neither ntpd, chrony nor systemd-timesyncd end up installed.