Something I have seen lately and I don't know if it's because my install, does pop-os have enabled automated updates? when I just log in I can see the apt-get running update (normal) but also running apt-get upgrade --dry-run?
I have gnome-software instead of pop-shop but I have disabled automatic upgrades on the ui.
Thanks
Pop supports automatic updates since 22.04, but it is not enabled by default. You can check the settings under "OS Upgrades and Recovery" panel in the settings application.
Note that the dry-run flag means don't actually upgrade, just show what you would do, which could be used by another program to see what would happen if an upgrade were to happen. I'm guessing packagekit is using this output to determine what packages are available for upgrading.