You've built your screens, and linked various components to show click/hover states. But when you save that screen as a page template, you still have to hook up / revise the linked components on every board where you're using the template/screen. You want to show some dropdown options? make sure you copy/paste those into the other boards where you are using the screen that includes linked dropdown.

(of course, it would be even nicer if dropdowns could be an interactive component, kind of like tables, but I digress). My workflow could be off, but I use one board as a "sandbox" and another board as a presentation layer, and in this arrangement, saving a prototype flow to a synced saved page template would be very, very helpful. Maybe this is solved by copying a flow from one board to another, but...I'm not sure that's possible.