Thanks. I looked at that.
Oy. Pretty ugly and out-of-date vertical menu IMHO. A top menu + 2-level side vertical menu is fairly common with modern websites these days, and HU's menu layouts haven't changed much (if any) in many years. Maybe this would be something to consider refreshing and modernizing in the template itself. What is currently available looks as old as it is.
In the intereim, I need to find somebody who can help me custom-create a modern menu like the multi-level combo menu at https://www.vanta.com/. Ideas?