I see there was a plugin for this solution — but that is 3 years old.
Is there a better way to handle this now with more updated GP versions?
NOTE for admins for the listed URL:
While at the moment in my main menu some parent items (eg under Accommodation) have an action page (eg BROOME) — on mobile, I’d like all of the menu items with a drop-down level of pages to be clickable this way (the whole row, not just the tiny arrow). I will be removing the parent item links to actual pages, so they are just text headings within the menu (as you can see under Packages, albeit they will have pop-out child menus).