JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js"></script>
<div class="myspinner">
  <div class="spinner-border" role="status">
  </div>
</div>

CSS

.myspinner {
   height: 100vh;
   display:flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
 }