Request: header with categories BY DEFAULT EXPANDED

Here would be the solution, without using Jquery

<script>
window.addEventListener('block-loaded-header1', () => {
  const accordionElements = document.querySelectorAll(".MuiAccordion-root");
  accordionElements.forEach((element) => {
    const button = element.querySelector('div[role=button]');
    if (button) {
      button.click();
    }
  });
});
</script>

Same as before => App or page level => custom code => Header or footer should work. Just change “header1” by your header ID/Name