Run as user (non-root)
gsettings set org.gnome.software download-updates false
gsettings set org.gnome.software download-updates-notify false
gsettings set org.gnome.software allow-updates false
https://askubuntu.com/questions/959353/disable-gnome-software-from-loading-at-startup
https://www.reddit.com/r/Fedora/comments/bjv8p6/disable_gnomesoftware_and_packagekitd/
sudo systemctl stop packagekit-offline-update.service
sudo systemctl disable packagekit-offline-update.service
sudo systemctl mask packgekit-offline-update.service
https://www.reddit.com/r/gnome/comments/80kr8b/how_to_disable_the_package_updater/
https://ask.fedoraproject.org/t/how-to-fix-gnome-software-being-empty/16648/18
Fedora Linux