JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<a href="#">Ссылка</a>

CSS

a:before {
   font-family: FontAwesome;
   content: "\f2dc";
}