from https://timtech.blog/posts/limiting-async-operations-promise-concurrency-javascript/

batch-promise.js

async function batchPromise(items, handler, batchSize) {
  const array = items.slice();
  let results = [];
  let i = 0;
  while (array.length) {
    const res = await Promise.all(array.splice(0, batchSize).map(handler));
    console.log(`Performed operation for batch ${++i}.`);
    results = results.concat(res);
  }
  return results;
}

batch-promise.test

async function test() {
  async function testHandler(param) {
    return new Promise((resolve) => {
      setTimeout(() => {
        console.log(`Performed operation for resource ${param}.`);
        resolve(`-->${param}`);
      }, 300);
    });
  }

  const array = Array.from({ length: 10 }, (_, i) => i + 1);
  const handler = (id) => testHandler(id);
  const results = await batchPromise(array, handler, 3);
  console.log(results);
}