I just thought of something that could be possible as I was thinking about this topic to create an explainer video for developers. Since you are using Ajax, you could create your own REST endpoint in WordPress to display a virtual page executed through a custom callback. It's advanced coding, but very doable if you understand Formidable's architecture at a molecular level.
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In my opinion, it is not feasible to address a form page as a web page because the concept of physical form pages does not exist. Form pages are virtual pages, and their identification is solely based on the fields contained between the page separator fields. Even the fields displayed on a form can be virtual, as the form’s shortcode allows for the hiding or display of fields. Page separators are actual fields stored in the database. If you inspect the HTML source code of the generated form in your browser’s inspection tools, you will observe that Formidable performs extensive field manipulation behind the scenes to display each virtual page. All form fields are present on every page, but not every form field is displayed on every page. Formidable conceals fields that are not intended to be displayed on a particular page.