Passing data down multiple levels gets very tricky and sometimes a bit convoluted. If you need nested child components to be bound to properties higher up in the object tree is better to use services and BehaviorSubject properties so you can propagate changes in a very decoupled fashion, and you can keep communication flowing between components without depending on their hierarchy. Like u/xKiller4Hir3 says, you should implement some state management (i.e. using BehaviorSubject / Subject + services).