For form field editing, you need a premium license.
To test form field editing you need to use the demo's premium license, to do so you need to give your project the demo's package name/product id (com.radaee.reader)
To extract form fields values, you can check the APIs JsonFormFields , GetJsonFormFieldsAtPage(page), for a guide check
Get/Set form fields in JSON format in Xamarin (Android)
For Xamarin Documentation, please check
Knowledge Base - Third part tools
Thanks for the answer. I found that my issue was that I was trying to use the OpenFromAssets and from a URL for my testing. Those don't allow the forms fields to be edited. Only the Open from file system is setup to allow you edit the fields but because the demo was asking to save modifications when I hit the back button, I didn't think of that being a possibility. Sorry for the confusion but I hope that this helps someone else that stumbles onto this topic.