A simple heart animation using alignment guides to wipe on and off.

heart.swift

import SwiftUI

struct ContentView: View {
    @State private var isOn = false
    
    var body: some View {
        VStack {
            Image(systemName: "heart")
                .overlay {
                    Image(systemName: "heart.fill")
                        .mask(alignment: .bottom) {
                            Circle()
                                .scale(isOn ? 1.2 : 1)
                                .alignmentGuide(.bottom) { d in
                                    isOn ? d[.bottom] : d[.top]
                                }
                                .alignmentGuide(.leading) { d in
                                    isOn ? d[.leading] : d[.trailing]
                                }
                        }
                }
                .symbolEffect(.bounce.down, value: isOn)
                .onTapGesture {
                    isOn.toggle()
                }
                .foregroundStyle(.red)
        }
        .animation(.default, value: isOn)
        .font(.largeTitle)
        .padding()
    }
}

#Preview {
    ContentView()
}