iOS 13 - invertColorsStatusDidChangeNotification no longer working?

I'm in the process of updating our app for iOS 13 compatibility, and I've noticed that I no longer get a Notification when observing the UIAccessibility.invertColorsStatusDidChangeNotification property. I've tried it with both classic invert and smart invert. Changing either of those settings produces no Notification callback in our app. Is this property still something that should be used in iOS 13?