Not able to store data fetched from an API into an array - using axios.get (async/await) - multiple API calls in a foreach loop

Question

Using axios to call an API, and running calls in a loop to fetch data from response - Traversing through a tree of elements (I'm trying to fetch Element-IDs) I suspect (but obv not sure), by the time API returns a response, the loop ends and array doesn't get populated. It is a nested structure of loops.

I'd really appreciate if someone could help please.

Code snippet:

async function callTheApi(assetId) {
  const baseURL = process.env.API_ENDPOINT;
  const endpointVersionUrl = 'some_endpoint';
  const endpointUrl = `/endpointA/${assetId}/endpointB`;

  const config = {
    headers: { Authorization: `Bearer ${process.env.AUTH_TOKEN}` },
  };

  const response = await axios.get(
    `${baseURL}${endpointVersionUrl}${endpointUrl}`,
    config,
  );

  return response;
}

async function fetchAllChildrenAssetId(assetId) {
  const response = await callTheApi(assetId); //returns an array of objects
  const responseALLChildArray = response.data;
  console.log(responseALLChildArray);

  let allChildrenAssetArray = [];
  let sizeOfTempArrayIsNotZero = true;

  let immediateChildArray = [];

  responseALLChildArray.forEach((element) => {
    allChildrenAssetArray.push(element.minor_id);
    immediateChildArray.push(element.minor_id);
  });
  while (sizeOfTempArrayIsNotZero) {
    let tempChildArray = [];

    immediateChildArray.forEach(async (element) => {
      const response = await callTheApi(element); //returns an array of objects

      const res = response.data;
      res.forEach((element) => {
        allChildrenAssetArray[allChildrenAssetArray.length] = element.minor_id;
        tempChildArray[tempChildArray.length] = element.minor_id;
      });
    });

    immediateChildArray = [];

    immediateChildArray = tempChildArray;
    if (tempChildArray.length === 0) {
      sizeOfTempArrayIsNotZero = false;
    }
  }
    console.log(allChildrenAssetArray);

  return allChildrenAssetArray;