From withing the “More Options” ellipsis menu, the addition of the option to add that widget (in my specific use case, Charts) to a Dashboard with the option for which Dashboard it should be added.
The widget could be copied or mirrored into the chosen Dashboard along with the connected boards from which the widget (chart) is derived.
Coming from the opposite direction, within the Dashboard “Add Widget” Options Menu, show existing configured widgets (charts) from your other boards to be selectable to add into the current Dashboard, of course adding the required board linkages to the Dashboard.