There are a few reasons that cause audio icon problems.
A restart can fix most of these files and get audio icons back to normal.
Just go toSettings>System>Sound.
Sometimes, the wrong output unit can cause to display the wrong audio icon on Windows 11.
To restart the Windows Audio service, follow the steps below.
To check and update audio drivers, you might refer to the following tutorial.
Choose toKeep my filesorRemove everythingto start the process.
Hope this article can lead you out of the woods.