Implementing a modifier that adds an action to perform when the user moves his finger over or away from the view’s frame

Let’s imagine HStack full of views. You put down your finger on the leftmost view and lift it up on the rightmost one. What modifier to use for the views in-betweeen just to be notified when the finger is sliding over them? With mouse it would be onHover, but with finger is there anything?

Without a modifier, the result can be achieved with this code:

import SwiftUI
import PlaygroundSupport
//
//  How to refactor this ugly code 
//  with a modifier similar to onHover(perform:)?
//
struct ContentView: View{
    @State var isHovered = Array(repeating: false, count: 8)
    @State private var location = CGPoint.zero

    var body: some View{
        HStack{
            ForEach(0..<8){ i in
                GeometryReader{ g in
                    Rectangle()
                    .fill(isHovered[i] ? .orange : .gray)
                    .onChange(of: location) { newValue in
                        isHovered[i] = g.frame(
                            in: .named("keyboardSpace")
                        ).contains(location)
                    }
                }
            }
        }
        .gesture(
            DragGesture()
                .onChanged { gesture in
                    location = gesture.location
                }
                .onEnded{ _ in
                    isHovered = Array(repeating: false, count: 8)
                }
        )
        .frame(width: 500, height: 500)
        .coordinateSpace(name: "keyboardSpace")
    }
}

PlaygroundPage.current.setLiveView(ContentView())