Reactjs, CORS errors while making post request using axios – PHP Versions

I am using React.js 18 version. Facing CORS issue on a piece of code while making post request using axios. Intentionally not putting the original URL of post request. Attaching API response screenshot files below the code.

I am getting response in postman but not in browser(CORS). All I know from my colleague, this API is build on PHP and according to backend guy things are fine on his side.
I am putting this code here to know what are we doing wrong on front end? We are stuck here since yesterday.
Please help!

console response : https://i.stack.imgur.com/HbUjq.png
network response : https://i.stack.imgur.com/6xycq.png
network response : https://i.stack.imgur.com/5cjey.png
postman response : https://i.stack.imgur.com/MxyDT.png

import React, {useState, useEffect} from 'react';
import axios from 'axios';
import './App.css';

function App() {
  const [CaseDetail, setCaseDetail] = useState([]);

  const getCaseDetail = async () => {
const casedetail = {schemeNameDratDrtId:'1',casetypeId:'1',caseNo:'1',caseYear:"2020"}; 
    await axios.post('URL', casedetail,
    {
      headers: {"Access-Control-Allow-Origin": "*"}
    } 
    )
    .then((result) => {
      setCaseDetail(result.data.data)
      })
   }

   useEffect(() => {
    getCaseDetail();  
  }, []);
  console.log(CaseDetail)

  return (
    <div className="App">
      <h2>Welcome to Home Page</h2>
    </div>
  );
}

export default App;