Well, either I'm a complete idiot, there's an issue with the template, or both (I have emailed the template support). One of the issues is probavbly that I"m brand new to Joomla 4 and still struggling with getting comfortable with the interface.
When I click the menu tab, per the documentation, I don't get the menu builder, megamenu, off-campus but manage, all menu items, add moduel to the dashboard.
What is the path to the mega menu? Home > System > Module (or whatever).
Thanks again to you both for kicking in and sorry for being such a ____