Control Center
Clearly borrowed from iPadOS, Big Sur now features a full control center that can be called up from the top right corner, providing options for things like Wi-Fi, Bluetooth, AirDrop, Do Not Disturb, display brightness, audio volume, and playback controls. MacBook users can even access keyboard brightness controls from here too.
Not only does this put more options are your fingertips, but it will also help you keep your menu bar significantly less cluttered, since many of the controls that previously had to live there for quick access can now be tucked into the new Control Center, where they’re only one more click away. You can even drag-and-drop controls between the Control Center and the menu bar.