If I use the form inside a landing page (iframe), but the user arrived late, or something like that, I don't want him to leave my site to enter the clickup, I want he can continue browsing the site, until he does some action, buy something and etc.
So, I can customize the form, putting some button or help text or cta...
Like "This form is closed but you can Follow this steps to get your appointment" - CTA