How do I create a ticket with multiple attachment using freshservice api?

exports.app = onRequest({cors: true}, (req, res) => {
  const form = formidable({ multiples: true, maxFileSize: 15 * 1024 * 1024 });
  form.parse(req, (err, fields, files) => {
    if (err) {
      logger.error(err);
      res.status(500).send({ error: 'Failed to parse form' });
    } else {      
      const dataSourceString = fields['dataSource[]'];
      var dataSourceList = JSON.parse(dataSourceString);
      
      const fileList = files['attachment[]'];
      
      fileList.forEach((file, index) => {
        // Modify filename as needed
        const parts = file.name.split('.');
        const name = parts[0]; // Filename without extension
        const extension = parts.slice(1).join('.'); // File extension

        var fileName = dataSourceList[index].docType;
        fileName = fileName.replace(///g, " ");
        file.name = `${fileName}.${extension}`;
     });

      const ticketData = {
            subject: 'Test',
            description: fields.description,
            priority: 1,
            status: 2,
            email: fields.email,
        };
      
        function formatDate(date) {
          return new Date(date).toISOString();
      }

      const formData = new FormData();

      formData.append('subject', ticketData.subject);
      formData.append('description', ticketData.description);
      formData.append('priority', ticketData.priority);
      formData.append('status', ticketData.status);
      formData.append('email', ticketData.email);


      fileList.forEach((file) => {
        const stream = fs.createReadStream(file.path);
        const blob = new Blob([stream], { type: file.type });
    
        formData.append('attachments[]', blob, {
            filename: file.name,
            contentType: file.type,
        });
    });

      const configData = {
        method: 'post',
        url: config.fsURL + '/api/v2/tickets',
        headers: {
          'Authorization': 'Basic ' + Buffer.from(config.fsAPIKey + ':x').toString('base64'),
          'Content-Type': 'multipart/form-data'
        },
        data : formData
      };

      axios(configData)
        .then(function (response) {
            console.log(response.data);
            res.status(200).json(response.data);
        })
        .catch(function (error) {
            console.log('Error:', error.toJSON());
        });
    }
  });
});

I have code as above and it seems to work fine for all fields. However there seems to be some problem when I try to upload multiple attachments. It doesn’t seem to be inserting files correctly as I am getting attachments as [[Object], [Object]] when return after create ticket.

Details can be shown as below. Anyone have any idea how this can be done?