I think Forms CS does not support creation of an Adaptive Form compliant to the XFA form. However, you can create an Adaptive Form out of a given XFA form by using the Automated Form Conversion Service. XFA form is also used as a Document of Record bound to the given Adaptive Form such that if you h...

Did you consider show/hide of the panels? Or maybe you could implement via lazy loading approach? Alternatively, you consider headless form approach wherein the client side could coordinate with some server side logic to fetch the qualifying form json. 

you may want to mail to headlessadaptiveform@adobe.com from your work email address if you want to learn more.

Please send an email to afforms-headless_beta@adobe.com from your official mail id and provide a bit of background about what you want to achieve. 

There is a headless form tech in beta that could also be a candidate for multi channel support including apps. You could consider using it for your use case. 

This toolbar with Submit button comes up when the XFA form is rendered into HTML.