JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="keywords" content="" />
<meta name="description" content="" />  

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.2/css/bootstrap.css"  rel="stylesheet">
<link href="https://cdn.datatables.net/1.10.23/css/dataTables.bootstrap4.min.css"  rel="stylesheet">
<link href="https://cdn.datatables.net/buttons/1.6.5/css/buttons.bootstrap4.min.css"  rel="stylesheet">

<script src="https://code.jquery.com/jquery-3.5.1.js"></script>
<script src="https://cdn.datatables.net/1.10.23/js/jquery.dataTables.min.js"></script>
<script src="https://cdn.datatables.net/1.10.23/js/dataTables.bootstrap4.min.js"></script>
<script src="https://cdn.datatables.net/buttons/1.6.5/js/dataTables.buttons.min.js"></script>
<script src="https://cdn.datatables.net/buttons/1.6.5/js/buttons.bootstrap4.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.1.3/jszip.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.53/pdfmake.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.53/vfs_fonts.js"></script>
<script src="https://cdn.datatables.net/buttons/1.6.5/js/buttons.html5.min.js"></script>
<script src="https://cdn.datatables.net/buttons/1.6.5/js/buttons.print.min.js"></script>
<script src="https://cdn.datatables.net/buttons/1.6.5/js/buttons.colVis.min.js"></script>


<script src="index.js"></script>
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/all.css" integrity="sha384-50oBUHEmvpQ+1lW4y57PTFmhCaXp0ML5d60M1M7uH2+nqUivzIebhndOJK28anvf" crossorigin="anonymous">
			

</head>
<body>

<table id="example" class="table table-striped table-bordered" style="width:100%">
        <thead>
            <tr>
                <th>Name</th>
                <th>Position</th>
                <th>Office</th>
               ...

CSS

div.dt-buttons {
  justify-content: center !important;
}

JavaScript

$(document).ready(function() {
    var table = $('#example').DataTable( {
        lengthChange: false,
		
		// Does not work
		buttons: [  
			{
				extend: 'collection',
				autoClose: 'true',
				text: '',
				tag: 'span',
				className: 'fas fa-file-export',					
				buttons: [ 'copy', 'csv', 'excel']
			},
			{
				extend: 'colvis',
				text: '',
				tag: 'span',
				className: 'fas fa-th',
				
			},
			{
				extend: 'pageLength',
				text: '',
				tag: 'span',
				className: 'fas fa-list-ul',
			},				
		], 
		
		// Works
		//buttons: ['csv', 'excel', 'pageLength', 'colvis' ],  
    } );
 
    table.buttons().container()
        .appendTo( '#example_wrapper .col-md-6:eq(0)' );
} );