For loop inside xhr onreadystatechange request not working

Question

I'm uploading files through google drive API resumable upload as multiple chunks to monitor the upload state. So I used for loop to request for each chunk. The full code is as below :

xhr.onreadystatechange = async function () {

    if (this.readyState == this.HEADERS_RECEIVED) {
      // Get the raw header string
      var headers = xhr.getAllResponseHeaders();
      // Convert the header string into an array
      // of individual headers
      var arr = headers.trim().split(/[\r\n]+/);
      // Create a map of header names to values
      var headerMap = {};
      arr.forEach(function (line) {
        var parts = line.split(": ");
        var header = parts.shift();
        var value = parts.join(": ")
        headerMap[header] = value;
      });
      const resumableURI = headerMap.location
      console.log('resumable uri : ' + resumableURI)
      const fileChunks = divideFileInChunks(req.files.muploadedFile.data)
      
      try {
        for( let i =0; i<fileChunks.length; i+=1) {
           console.log('inside for loop');
             axios.put(`${resumableURI}`,  bufferToStream(buffer),
              {
               headers: {
                 Authorization: `Bearer ${accessToken }`,
               "Content-Length": req.files.muploadedFile.size,
               "Content-Range": `bytes ${fileChunks.start}-${fileChunks.end }/${req.files.muploadedFile.size}`
                 } 
             }).then( resp => {
                    console.log(resp.data);
                  }).catch( e => console.log(e))
            return res.status(200).json({'message' : `${i+1} Chunk Uploaded of ${fileChunks.length}`})             
            }
        } catch (f) {
        res.send(f.message);
      }

             
    } 
  };
xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
xhr.setRequestHeader("Authorization", `Bearer ${accessToken }`);
xhr.send( //3
    JSON.stringify({
      name: req.files.muploadedFile.name,
      mimeType: req.files.muploadedFile.mimetype, 
    })
  );

});

The problem here is the code inside for loop is not executing.