I'm pretty sure @rdieter already did that: https://pagure.io/fedora-kickstarts/c/0b624bcd116f5875c9ada1775b10a8f983e0bc19

Is it not working for some reason?

I noticed this on a live Fedora 34 system, iso downloaded yesterday via media writer. I'm not sure if those isos are updated at all since the initial 34 release, but either way, this is the iso that people are going to be using.

I just tried this on a rawhide live system. Despite my internet connection being active, Discover says on the default Featured page "Unable to load applications. Please verify Internet connectivity." However, clicking a category on the left pane like "Applications" seems to load a list of applications just fine, albeit they're seemingly all flatpaks. Not sure what's going on here, maybe something to report upstream.

In the terminal output, on startup, Discover complains about Could not find a category for "fwupd.backend", despite fwupd.service being active. Should fwupd even be running on a live system?

Also, if we can, it would be nice to hide and disable the "Fetching updates../Up to date" button on the left pane entirely, for the live system.

These would probably be feature requests to log with Discover on bugs.kde.org.

I have filed an upstream bug: https://bugs.kde.org/show_bug.cgi?id=440078

So I believe there's a misunderstanding here. What we implmented was that the update notifier would not run. My impression of what reporter is seeing: running discover, and seeing it show that updates are available. That's something altogether different, and not something I'm comfortable changing behavior of, ie, it should be possible to update/install something on the live image, if that's what you really want to do.

Given that, I feel this can probably just be closed "Won''t fix"