sudo apt update ; sudo apt upgrade ;
... (nothing out of the ordinary looking) ....
42 packages can be upgraded. Run 'apt list --upgradable' to see them.
Notice: Missing Signed-By in the sources.list(5) entry for 'https://mntre.com/reform-debian-repo'
Notice: Some sources can be modernized. Run 'apt modernize-sources' to do so.
Upgrading:
evince evince-common gstreamer1.0-plugins-good gstreamer1.0-pulseaudio libevdocument3-4t64 libevview3-3t64
Not upgrading:
libkf6colorscheme6 libkf6iconwidgets6 libqt6dbus6 libqt6qml6 libqt6quickwidgets6 libqt6waylandcompositor6 minetest-data qt6ct
libkf6configwidgets6 libkf6windowsystem6 libqt6gui6 libqt6qmlmodels6 libqt6sql6 libqt6widgets6 qt6-gtk-platformtheme
libkf6globalaccel6 libkirigamiplatform6 libqt6network6 libqt6quick6 libqt6sql6-sqlite libqt6wlshellintegration6 qt6-qpa-plugins
libkf6iconthemes-bin libqt6concurrent6 libqt6opengl6 libqt6quickcontrols2-6 libqt6svg6 libqt6xml6 qt6-svg-plugins
libkf6iconthemes6 libqt6core6t64 libqt6printsupport6 libqt6quicktemplates2-6 libqt6waylandclient6 minetest qt6-wayland
Summary:
Upgrading: 6, Installing: 0, Removing: 0, Not Upgrading: 36
Download size: 4,231 kB
Space needed: 524 kB / 1,831 GB available
Let me know if I can clarify anything.