JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  <select>
    <option>Опция 1</option>
    <option>Опция 2</option>
    <option>Опция 3</option>
  </select>
  <input type="text">
</div>

CSS

div {
  display: flex;
  align-items: center;
}

input {
  height: 40px;
}