JSFiddle - React, Tailwind, and code Playground

HTML

<fieldset>
  <legend>Текст</legend>
</fieldset>

CSS

fieldset{
  position:relative;
}
legend{
  display:inline;
  position:absolute;
  width:200px;
  left:50%; top:-10px;
  margin-left:-100px;
  background:#CCC;
  text-align:center;
}