I am utilising the AEM WCM Core Components - V2 Page Component. When I edit the page within the Classic UI Page Editor, I am not able to edit the page (though all my components have Classic UI dialogue enabled). Editing content only works with the Touch UI Page Editor.
How can I enable the Classic UI Page Editor when I am editing a page that has a sling:superResourceType of AEM WCM Core Components - V2 Page Component?
That's a tough one, because Core Components are not supporting ClassicUI anymore. Most likely this issue you observe is rather simple to solve, but I am not aware of any documentation to make it work.
The way I would approach would be to compare a "classic" page with this CoreComponent page node by node, property by property.