The SMS icons at the bottom of the Android phone are all gone. How can I get rid of it?

Refer to the operation of vivo mobile phone:

Funtouch OS 10 and above: long press the blank space of the desktop, long press any software icon on the desktop, drag the icon to the desired position, and then slide or press the back key to return;

Funtouch OS 10 or below: long press any software icon on the desktop. When the icon is in a floating state, drag the icon to the position where you want to place it, and then slide it again or press the back key to return.