JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.13/js/select2.min.js" integrity="sha512-2ImtlRlf2VVmiGZsjm9bEyhjGW4dU7B6TNwh/hx/iSByxNENtj3WVE6o/9Lj4TJeVXPi4bnOIMXFIJJAeufa0A==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.13/css/select2.min.css" integrity="sha512-nMNlpuaDPrqlEls3IX/Q56H36qvBASwb3ipuo3MxeWbsQB1881ox0cRv7UPTgBlriqoynt35KjEwgGUeUXIPnw==" crossorigin="anonymous" referrerpolicy="no-referrer" />
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/select2-bootstrap-5-theme@1.2.0/dist/select2-bootstrap-5-theme.min.css" />

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">


<div class="">
  <select id="search_bar" class="form-select w-25">
    <option value="1">
      This is a long option string
    </option>
    <option value="2">
      This is another long option string
  </option>
  </select>
</div>

CSS

.select2-selection__clear {
    position: absolute !important;
    right: 2px !important;
}

JavaScript

$("#search_bar").select2({
    theme: 'bootstrap-5',
    placeholder: "Some text",
    allowClear: true
});