A: The Form element in the landing page editor always creates a new form for that landing page. It has no option to pick an existing form, and a landing page can hold one Form element.
To show an existing form on a landing page, embed it with a Custom HTML element:
- Open the form and go to Publishing options → Embed.
- Under Embed on website, click Copy to copy the embed code.
- In the landing page editor, add a Custom HTML element to a column and paste the code into it.