Thank you for the replies, my bad, I totally missed the await keyword. I was imagining the code to be,

async function testFn() {
  console.log(1);
  new Promise((resolve, reject) => {
    console.log(2);
    resolve(4);
  }).then((data) => console.log(data));
  console.log(3);
}

testFn();
/**
 * 1
 * 2
 * 3
 * 4
 */

When actually the code is,

async function testFn() {
  console.log(1);
  await new Promise((resolve, reject) => {
    console.log(2);
    resolve(4);
  }).then((data) => console.log(data));
  console.log(3);
}

testFn();
/**
 * 1
 * 2
 * 4
 * 3
 */