Form inside Shopify Page

It's possible to put any forms on any Shopify page (using Page you can have your own URL, so it doesn't have to be /apps/product-registration, please see Shopify page documentation for how to customize the URL and other detail)
To put the form inside a page, all it need is to add the form block to page in theme's customizer
Go to Shopify admin > Online Store > Select the current theme > Customize
Go to the page, then add a section/block to the page