PartialSheet | SwiftUI Partial Sheet fully customizable with dynamic height | iOS library

I'm looking for a way of observing @State or @Binding value changes in onReceive. I can't make it work, and I suspect it's not possible, but maybe there's a way of transforming them to Publisher or something while at the same time keeping the source updating value as it's doing right now?

Below you can find some context why I need this:

I have a parent view which is supposed to display half modal based on this library: https://github.com/AndreaMiotto/PartialSheet

For this purpose, I've created a @State private var modalPresented: Bool = false and I'm using it to show and hide this modal view. This works fine, but my parent initializes this modal immediately after initializing self, so I completely loose the onAppear and onDisappear modifiers. The problem is that I need onAppear to perform some data fetching every time this modal is being presented (ideally I'd also cancel network task when modal is being dismissed).