Hello,

If you want the same button for all products, you can create an HTML block, insert the button or the popup elements, and put the HTML shortcode into Before/After Add to cart area (more detail on the below screenshot).

https://prnt.sc/wVpm3ue_W7GE

Find our documentation tutorial about this here: https://xtemos.com/docs-topic/html-blocks-usage/

Please let us know if there is anything further we can assist you with!

Best Regards