Custom script/iframe after “Add to Cart” in WooCommerce for every product

I need to add a custom script/iframe for each product on a WordPress/WooCommerce site. I want it to show after the “Add to cart” button. I know I can use WooCommerce Hooks to perform this but I don’t know hot to set it up. I need to set a different script for each product so I want to have something to edit it in each product.

I searched online and came across this answer[1]. It’s good but it only works for links. I need it to work for a script/iframe.

How could I modify the code to make it work?

Thanks a lot for your help!

[1]: https://wordpress.stackexchange.com/questions/355057/add-a-custom-button-with-custom-link-after-add-to-cart-for-every-product?newreg=d210e27baf964a80ac504f238dcd7dbc

The page I need help with: [log in to see the link]