Easy Hide/Show Chord Symbols?

I remember Dorico having an interface/menu somewhere where you could easily toggle chord symbols on a per-instrument basis, but I can’t find it anywhere. Any ideas? I remember it being on Layout options, but it’s not there anymore.

In Setup mode, on each player’s context menu?

Yes, but wasn’t there a list where you could easily/quickly set which players have chord symbols? Am I imagining this?

You are imagining it. The way you specify which players show chord symbols is via the right-click menu in Setup mode.