Hi Maria2101,
Welcome to Microsoft Community and we regret the inconvenience caused to you.
Thanks for the description and let us understand your problem better. The speakers and headphones in Windows 11 are different from the icons on the Gigabyte motherboard. But there doesn't seem to be anywhere to modify it either. Sorry I don't have a Gigabyte motherboard to reproduce this issue due to environmental constraints. But this is most likely a BUG, of course, it is also possible that after you refresh Windows again, it returns to normal. Would it work if you tried uninstalling the sound card driver and then reinstalling it? This registry is associated with your Windows, and we do not recommend modifying it as it may cause another or more serious problem. Thank you for your patience and understanding.
Best Regards,
Manson | Microsoft Community Support Specialist