JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js"></script>
<table class="table" id="exampleTable">
  <thead>
    <tr>
      <th scope="col">c1</th>
    </tr>
  </thead>
  <tbody>
    <tr id="trid1" class="trclass">
      <th scope="row">1</th>
    </tr>
  </tbody>
</table>
<button type="button" id="addBtn">Add</button>

JavaScript

var count = 1;

$("#addBtn").click(function(){
  $('#trid1').clone().appendTo('table#exampleTable > tbody');
  count++;
  $('#trid1').last().prop('id', 'trid'+count);
  $('#trid'+count+' > th').html(count);
});