JSFiddle - React, Tailwind, and code Playground

JavaScript

oldObj={"data":[{"":"5201521d42"},{"id":"52049e2591"},{"id":"52951699w4"}]};
oldObj = oldObj.data;
myArray = [];

for (var key in oldObj) {
   
   var obj = oldObj[key];
   for (var prop in obj) {
      myArray.push(obj[prop]);
   }
}
console.log(myArray)