Windows 10: Applications/Games missing from Volume Mixer

Suddenly, for no apparent reason no new software, drivers or Windows updates installed certain games and apps have vanished from the Volume Mixer when app/game is running. The only ones that remain are System and Opera browser. Discord, Spotify, and all game apps do not appear when app/game is started. MS Teams appears when started.Have read and tried all recommended solutions listed under similar Subjects on this forum, including updating the Realtek HD audio driver for my Gigabyte motherboard. Unfortunately, I do not have a restore point available before this issue began so RSTRUI is no

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Xbox Game Bar doesn't show the volume mixer

EDIT:

• Edit 1: still no actual answer for a way to fix this. But I just factory reset my PC, the volume mixer works perfectly now. I know this is not the answer you wanted, but it's all we have
  

Before I go into details do not suggest:

• Fixing my audio driver by updating/removing it
• Resetting the Xbox Game Bar app
• Doing the 'sfc /scannow 'command
• Telling me to use the volume mixer built into windows
• Referring me to the Xbox Game Bar app troubleshooting page

OK, now that we go that out of the way. I have had this problem for about 3 weeks. The issue is that the Xbox Game Bar doesn't display the volume mixer correctly, it only shows the main audio driver's volume mixer and nothing else (no app volume mixer like:
CS:GO, Microsoft Edge Beta, Spotify etc.).

Photo for reference:





For the Microsoft employees reading this, this is a persistent issue in Windows. I will list other posts on this forum with the same issue to show the scale of the issue. All of these posts have not been solved so far:

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How can i get the volume mixer sound for a particular game if it's muted from volume mixer

Hello,

I understand your concern, and we in Community will try to help you in the best possible way we can.

I would like to inform you if a game is permanently muted in volume mixer, then you won’t be getting sound for that particular game. The applications which are having sound option might be listed in the volume mixer if you find those applications in
the volume mixer separately, then you can adjust the volume of those applications separately.

Hope this helps.

 

Muted Application Missing from Volume Mixer

Hi Rodrigo, thanks for the reply！

Sadly it doesn't appear in every device in the volume mixer and not in the "App volume and device preferences" while letting it produce sound.

I've also tried uninstalled and reinstalled the application but it doesn't work too.