Nodejs: axios request parallel way

Question

I have a code which execute request sequentially

  try {
    const results = [];
    for await (let tc of testCases) {
      const { data } = await axios.post("URL",
        {
          command_line_arguments: "",
          compiler_options: "",
          redirect_stderr_to_stdout: true,
          source_code: source_code,
          language_id,
          stdin: tc.input,
          expected_output: tc.output,
        }
      );
      results.push({ text: tc.text, input: tc.input, output: tc.output, testType: tc.testType, ...data });
    }

it works, but it is very slow.

I am looking to request all of them in parallel way.

Note: I have tries Promise all,Promise.allsettled, and Axios.all. Some how it didnt worked.

My solution:

const runTestCases = async (testCases: ITestCase[], source_code, language_id) => {
  try {
    const requests = createRequests(testCases, source_code, language_id);

      const result = await Promise.all(requests.map(async (response) => {
        const { data }:any = await response;
        return data;
      }));
      return result;

  } catch (error) {
    throw new BadRequestError(error?.message);
  }
};

/**
 *  Create array of request to run test cases in parallel
 * @param testCases
 * @param advance
 * @returns
 */
const createRequests = (testCases: ITestCase[], source_code: string, language_id: string) => {
  const requests = testCases.map((tc) => {
    return () => axios.post(process.env.JUDGE0_HOST,{
      redirect_stderr_to_stdout: true,
      source_code: source_code,
      language_id,stdin: tc.input,
      expected_output: tc.output
    })})
  return requests;
};

output:

[ undefined, undefined ]

Am I doing wrong ?

Thanks in advance!