Hey there,
This type of thing tends to be a configuration issue within Windows, rather than within WoW itself. WoW can take advantage of surround sound (whether that be a physical 5.1 or 7.1 system, or a virtual surround sound software when using just 2 speakers), but it’s Windows that tells WoW how to render the audio.
In Windows 10 right-click your Volume icon in the system tray and go to Spacial Audio, if that is turned on try turning that off.
If you have any virtual surround sound software installed, like MSI’s Nahimic or ASUS Sonic Studio for example, try uninstalling that and then reboot the PC before testing again.
In some cases reinstalling your audio drivers from your motherboard or system manufacturer’s support page can help reset those settings to defaults as well.