How to add an item in the middle of a collection list

Design help General
1

I am trying to add an ad in the middle of a collection list

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

2

I hope you got your answer on this one, because I cannot figure this out. I was trying to add an ad with a dynamic CTA button but I don’t think anyone knows this. I searched the web for the answer. No one has the answer yet.

3

You would need to use JavaScript to insert an element into the collection list. You could do this with vanilla JS or use jQuery since it is loaded on all projects.