SUMMARY
Hopefully this is the right product - I am not sure. 

I would like to propose a feature that allows toggling notification sounds on or off in a particular application's notification settings. We already have per-app controls for showing popups, showing notifications in history, showing notification badges and configuring per-event settings. 

If the app supports configuring notifications on a per-event basis, this is already possible by configuring the event not to play a sound. Otherwise, this is not possible.

My personal annoyance with this feature not being present is that I have to entirely disable notifications from Spotify's (poor) client, as I have no way to disable the notification chime when a notification that a new song is playing appears. I am sure many other circumstances where such a feature would be useful exist.

STEPS TO REPRODUCE
1. Procure an application that does not have support for configuring notifications on a per-event basis (e.g. Firefox, Spotify)
2. Try to disable notification sounds for that particular app


OBSERVED RESULT
No setting to disable notification sounds exists.

EXPECTED RESULT
A setting exists.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Fedora 38 @ 6.4.10-200.fc38.x86_64 (64-bit)
(available in About System)
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.8

ADDITIONAL INFORMATION