Can can I make desktop page example.com/page show on mobile version under same URL?
Long answer:
The mobile version is pants and utterly pointless. It creates an entirely separate website that you must maintain separately. URLs are entirely separate and content made for the desktop version is inaccessible on the mobile version.
If you want all users to be able to get to example.com/page regardless of their chosen device, disable the mobile version and use a responsive theme