I'll be the first to admit that I am certainly no Xcode expert. So thank you for taking the time to explain how the reference/symbols search works.

Another option, if you’re searching while going through code, is to right click on the symbol in your code and click Find > Find Selected Symbol in Workspace.

Funny enough, that's what I did. Everything in the search window is what was selected by default in Xcode; probably why I was confused. I still contend it's not intuitive.