JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

JavaScript

const material = {
11: {title: "title3", desc: "description2"},
22: {title: "title2", desc: "description1"},
33: {title: "title1", desc: "description3"}
}

const sortKey = (obj) => {
  const defaultOrder = [];
  for (let key in obj) defaultOrder.push(key);
  return defaultOrder.sort((a,b)=> b-a);
}

const test = sortKey(material);

for (let key of test) console.log(key, material[key]);