JSFiddle - React, Tailwind, and code Playground

HTML

<select name="select">
          <option selected="selected">Чебурашка</option>
          <option>Крокодил Гена</option>
          <option>Шапокляк</option>
          <option>Крыса Лариса</option>
      </select>

CSS

select:after {
    content:"sdfsdfds";
}