How to disable automatic installation of updates by gnome-software on Fedora 40?

Agree that this could be improved.

Feel free to open an issue in https://gitlab.gnome.org/GNOME/gnome-software/-/issues.

You can click the app row in the Updates page to see what’s changed in 'Update Details dialog.

This is not within the scope of GNOME Software though. It’s up to the respective apps / packages to provide what changed as part of their appdata / metainfo XML file. Refer this topic for more details.

Also, it could be that downstream distros (Debian / Fedora / Ubuntu etc) made a small downstream packaging change (which might have nothing to do with the actual app like Calendar) and pushed a new version. This new version will also be shown as 'Software Update' in GNOME Software with downstream changelog aka what-changed (if they provided some info) in 'Update Details' or empty otherwise.

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