Autoplay Second Carousel Summary Block on Page

I have a piece of code that I found online that auto plays a carousel summary block, but it only plays the first one on the page. Does anyone know a way for me to make it affect only the second summary block on the page? I've been googling and can't find an answer. I'm not great with code.

<!-- Summary Block Autoplay -->
<script>
window.onload = function() {
  var nextArrow = document.querySelector(".summary-carousel-pager-next");
  
  function clickNext() {
    nextArrow.click();
  }
 
  setInterval(clickNext, 3000);
};
</script>

It looks like it should apply to all of the summary carousels, do you have the next/previous arrows on for both summary blocks?

I do not, but I know this works only on the first one and it doesn't matter if the arrows are turned on or off, because that is how it functions on another page on my site.