The Control Center in 21.10 no longer has an icon for Sound. You can find a setting in Ayatana Indicators for Sound that let's you choose "Allow setting the volume above 100%."
Is that what you are looking for? 
The Control Center in 21.10 no longer has an icon for Sound. You can find a setting in Ayatana Indicators for Sound that let's you choose "Allow setting the volume above 100%."
Is that what you are looking for?