For anyone still looking, I found a workaround for auto-playing a SS Slider.
<!-- SS Slider auto scroll working script -->
Inject this is Settings > Advanced > Code Injection > Header
<!-- jQuery Library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<!-- Slider Autoplay -->
<script> setInterval(click, 5000); function click()
{
$("button.user-items-list-banner-slideshow__arrow-button.user-items-list-banner-slideshow__arrow-button--right").click();
}
</script> Invented/funded by Nikhil (smile)☺️ ❤️