JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
    <title>Page Title</title>
    </head>
    <body>
    <input type="text" name="input" id="input" disabled>
    <br><br>
    <label>Selecione a opção de recebimento do pedido</label>
    <select id="options" onchange="verifica(this.value)">
    <option value="2">1 - Delivery</option>
    <option value="3">2 - Retirada</option>
    </select>
    <br>
    <br>
    <label>Selecione a unidade que irá retirar o do pedido</label>
    <select id="options2" disabled>
    <option value="2">1 - Unidade </option>
    <option value="3">2 - Unidade</option>
    </select>
    </body>
    </html>

JavaScript

function verifica(v) {

  if(v == 3)document.getElementById("options2").removeAttribute("disabled"); 
  else document.getElementById("options2").setAttribute("disabled", "disabled");
}