Hello!
Unfortunately some applications are not displaying any notifications on my machine. Some of these are:
Firefox (WhatsApp, Telegram, …)
Discord
MS Teams
I am mainly obtaining my applications from FlatHub - including the ones mentioned above. To clarify, some applications are able to display notifications e.g. Discover, error messages, system messages/errors, information regarding connections (wifi, bluetooth,…).
This shouldnt have any relevance to atomic desktops.
On Kinoite using the preinstalled Firefox (RPM) I can assure notifications work.
If random proprietary Flatpaks using Electron dont work, there is likely not much Fedora can do about that.
You may have messed up your KDE notification settings. Have a look in systemsettings, there are colored dots on every chapter where you made changes and you can reset them to default.
Thank you for leading me into a direction:
I googled around and found this post. It is mentioned to enable notifications - which apparently already was enabled. I then just re-enabled and restarted the applications where I was missing notifications - that did the trick.
A helpful resource to test browser notifications is through this page.