<div class="panel-heading">
  <h4 class="panel-title">Panel Header with Dropdown</h4>
  <div class="btn-group my-n1">
    <button type="button" class="btn btn-success btn-xs">Action</button>
    <button type="button" class="btn btn-success btn-xs dropdown-toggle" data-bs-toggle="dropdown">
      <span class="caret"></span>
    </button>
    <div class="dropdown-menu dropdown-menu-end">
      <a href="javascript:;" class="dropdown-item">Action</a>
      ...
    </div>
  </div>
</div>