Hi there @Home in Style,
Welcome to the Community.
I hope I am understanding correctly. While you can't quite link pop-ups, you can embed them on certain pages or link to a Hosted Page. You can also trigger a Klaviyo pop-up to appear on certain URLs.
Unfortunately, we do not have this functionality with our built in popup forms from the signup form builder. However, we have a guide to doing this with a legacy popup form which requires custom coding.
You can have a Klaviyo pop-up appear on a certain link. At this time, it isn't possible to have it display after a click. In order to do that, you'd need to know the exact URL for the click. If you had one, you could add that pop-up. At this time, it isn't possible to only do it after a button click. A Klaviyo sign up can appear on a certain URL. You can adjust this in "Behavior," of a form. If your click goes to a URL you could have a pop-up appear. But you cannot have a pop-up appear for a click only. It isn't possible at this time within Klaviyo. It has been requested and I've added your info to it, but currently the pop-up can appear only on certain URLs not certain clicks.
Hope this helped,
Alex