I’d like to be able to block a certain page if the user is not using a mobile device. Perhaps by username and password only if the user is on a desktop, but allow access if they’re using a mobile device without fail.
And if you’re able to integrate version detection between mobile app and desktop browser this would be a great conditional statement and allow elements to show/hide or constrain workflows to mobile vs. desktop.
As an interim solution, could you use page widths to set a condition? Depending on whether tablets are considered mobile or desktop in your case, you could find a happy medium width to use as a baseline for access. “When current page width > or < xyz”…