MainView_final.swift

// 1 - Create class that will be used to pass new modal to root view
class FullScreenModalProvider: ObservableObject {
	var content: AnyView? = nil {
		willSet { objectWillChange.send() }
	}
}

struct MainView: View {
	// 2 - Add EnvironmentObject variable to root view
	@EnvironmentObject var fullScreenModal: FullScreenModalProvider
	
	var body: some View {
		// 3 - Wrap TabView in ZStack
		ZStack {
			TabView() {
				AccountView()
					.tabItem {
						Image(systemName: "person.crop.circle")
					}
				
				Text("Second")
					.tabItem {
						Image(systemName: "square.grid.2x2.fill")
					}
			}
			
			// 4 - Observe full screen modal content appearing
			if let view = fullScreenModal.content {
				DimmedView {
					view
				}
				.transition(.opacity)
				.zIndex(.greatestFiniteMagnitude)
				.edgesIgnoringSafeArea(.all)
			}
		}
	}
}