How to change Sort by icon to "Sort by icon + "Sort by" word"

Hello,

Which module you are talking about? Where you want to change the sort by icon to sort by word?

Kindly share screenshot by pointing out the section and page URL so I can check and help you out.

Best Regards.

Try to add the following code snippet to the Custom CSS area for mobile devices in Theme Settings

.woocommerce-ordering {
  width: auto;
}
.woocommerce-ordering:after {
  content: none;
}
.woocommerce-ordering:before {
  content: "Sort by";
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  color: #212121;
}