WIN10 (official version) The volume icon is missing how to recover?

Method One:

Click the "Notification" icon in the lower-right corner of the desktop to open the Operations center panel, as shown in the following figure.

Click All settings in the Operations center to open the Settings panel, as shown in the following illustration.

Go to the "Settings" screen and click "System", as shown in the following figure.

Go to the "System" interface, click "Notifications and Actions" on the left, and click "Choose which icons to display on the taskbar" on the right, as shown in the following figure.

Go to the "choose which icon to display on the taskbar" interface, find "volume", you can see its status is "off", we click on the button to make the status "open."

Finally you can see the volume icon appears in the lower-right corner of the desktop, as shown in the following figure.

Method Two:

Place the cursor in the taskbar under the desktop, right-click, and select Properties (R) in the list of bullets, as shown in the following figure.

Click the Customize (C) ... button in the pop-up Properties screen, as shown in the following illustration.

Click on the "Customize (C) ..." button to automatically enter the "Settings" in the "Notification and action" item, also click "Select the icon on the taskbar", the following operation is the same as the method.