This is what Gregg, from Cromulent labs, said a while back. "Apple rejected an app update and told us they would remove Launcher from the App Store if we didn't remove the Settings app launchers. So starting with Launcher v2.2.7, we no longer list Settings app launchers in the app. Note that existing Settings launchers continue to work in iOS 10, but no longer work in iOS 11."
I think you can shortcut to the settings menu, but no farther. Apple also disabled shortcuts to specifics in the clock app and voice memos.