I think it can be achieved by using some javascript code to set interval the clicking on next button
<script>
(function docReady(fn) {
// see if DOM is already available
if (document.readyState === "complete" || document.readyState === "interactive") {
// call on next available tick
setTimeout(fn, 1);
} else {
document.addEventListener("DOMContentLoaded", fn);
}
})(() => {
if ( window.location == window.parent.location ) {
const reelControls = document.querySelectorAll('section[data-section-id="630305ced17aa33b3d1a4e54"] .user-items-list-carousel__arrow-button--right');
reelControls.forEach(reelControl => {
(function reelTimer() {
setTimeout(() => {
reelControl.click();
reelTimer();
}, 2000); // change this value to change the speed
})();
})
}
});
</script>
Hope it can help