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