JSFiddle - React, Tailwind, and code Playground

HTML

<select id="testSelect">
    <option value="option1" label="1">Option 1</option>
    <option value="option3" label="3">Option 3</option>
    <option value="option5" label="5">Option 5</option>
</select>

JavaScript

$("#testSelect").append("<option value='option11' label='2'>Option 2555555</option>");

$("#testSelect option").sort(function(a, b) {
    if ($(a).attr('label') < $(b).attr('label')) return -1;
    if ($(a).attr('label') > $(b).attr('label')) return 1;
    return 0;
}).appendTo('#testSelect');