How to unlock speaker setting in windows 10

In Control Panel, double-click the Sounds and Audio Devices icon. On the Audio tab, select a device from the Sound Playback list. Select the Advanced button. Select the Speakers tab.

For more you can check this out: https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/applying-speaker-configuration-settings#:~:text=In%20Control%20Panel%2C%20double%2Dclick,Select%20the%20Speakers%20tab.