JSFiddle - React, Tailwind, and code Playground

HTML

<div id="last-comments"><div class="line"><span>текст</span></div></div>

CSS

#last-comments {
  position: relative;
  text-align: center;
}

#last-comments .line {
 position: relative;
 color: #777;
 background: #fff;
 display: table;
 margin: 0 auto;
 z-index: 2;
 padding: 5px 20px;
}

#last-comments:before {
 content: '';
 width: 100%;
 height: 1px;
 border-top: 3px dotted #000;
 z-index: -1;
 top: 50%;
 position: absolute;
 left: 0;
}