Embeded code with external links in rich text don't open link

So I’ve created a custom section with an embed code editor as an additional section at the end of a specific article with a button that is linked to Typeform.

However, it opens up a link like this:

The code:

Which part am I missing here? And I know I can add external links to rich text. This one is created with the embed code editor.

Can you share your project’s read-only link please?