JSFiddle - React, Tailwind, and code Playground

HTML

<h2 class="outter-h2"><span class="outter-span">?</span></h2>

CSS

.outter-h2 {
    width: 200px;
    text-align: center;
    border-bottom: 1px solid #cccccc;
    line-height: 0.1em;
    margin: 35px auto 35px;
}
 .outter-span {
   	 background: #fff;
    padding: 0 10px;
    border: 1px solid #cccccc;
    border-radius: 50%;
    color: #bec3c7;
}