MapAnnotation Position

I am working on a MapView with MapAnnotation on the Map and am having difficulty getting the MapAnnotation to function properly when selected. In my code, I want the MapAnnotation selected to be to the front if it is behind or partially blocked by another annotation. I have tried using a zIndex but this does not appear to work. Below is my MapView code along with a screenshot of the issue. Any help would be greatly appreciated.

struct HospitalMapView: View { @StateObject var viewModel = HospitalViewModel() @State private var showSearchView = false @State private var showListView = false @State private var selectedTab: Int = 0

var body: some View {
    ZStack {
        VStack(spacing: 0) {
            TopTabView()

            // Map that updates the visible hospitals when the user moves or adjusts the map
            Map(coordinateRegion: $viewModel.region, interactionModes: .all, annotationItems: viewModel.filteredHospitals) { hospital in
                MapAnnotation(coordinate: CLLocationCoordinate2D(latitude: hospital.latitude, longitude: hospital.longitude)) {
                    RoundedRectangle(cornerRadius: 40)
                        .fill(viewModel.colorForPercentile(viewModel.calculatePercentile(for: hospital, in: viewModel.filteredHospitals)))
                        .frame(width: 70, height: 30) // Maintain consistent size, adjust if necessary
                        .overlay(
                            Text("$\(Int(hospital.baseCharge / 1000))K")
                                .foregroundColor(.white)
                                .bold()
                        )
                        .overlay(
                            RoundedRectangle(cornerRadius: 40)
                                .stroke(Color.blue, lineWidth: viewModel.selectedHospital == hospital ? 3 : 0)
                        )
                        .onTapGesture {
                            viewModel.selectHospital(hospital)
                            // Move the selected hospital to the end of the list to bring it to the front
                            viewModel.bringHospitalToFront(hospital)
                            viewModel.showBottomSheet = true
                        }
                        .scaleEffect(viewModel.selectedHospital == hospital ? 1.1 : 1.0) // Highlight the selected hospital
                        .zIndex(viewModel.selectedHospital == hospital ? 1 : 0) // Set the zIndex higher for the selected hospital
                        .animation(.easeInOut, value: viewModel.selectedHospital) // Smooth transition
                }
            }
            .onAppear {
                // Initial update of visible hospitals when the map appears
                viewModel.updateFilteredHospitals()
            }
            .onChange(of: viewModel.region) { _ in
                // Update the visible hospitals as the user changes the map region
                viewModel.updateFilteredHospitals()
            }
            .edgesIgnoringSafeArea(.all)
        }

        // Hospital count display hovering over the map
        Text("\(viewModel.filteredHospitals.count) Hospitals")
            .font(.subheadline)
            .foregroundColor(.white)
            .padding(8)
            .background(Color.black.opacity(0.6))
            .cornerRadius(10)
            .padding(.top, -315) // Adjust padding to position correctly below the TopTabView
            .zIndex(1) // Ensure it's above the map

        if let selectedHospital = viewModel.selectedHospital, viewModel.showBottomSheet {
            BottomSheetView(isOpen: $viewModel.showBottomSheet, maxHeight: UIScreen.main.bounds.height * 0.3) {
                SummaryTabView(selectedHospital: Binding(
                    get: { selectedHospital },
                    set: { newValue in viewModel.selectHospital(newValue) }
                ))
            }
            .transition(.move(edge: .bottom))
            .animation(.spring())
        }
    }
    .safeAreaInset(edge: .bottom) {
        BottomTabView(selectedTab: $selectedTab, showListView: $showListView, showSearchView: $showSearchView,
            onSearchSelected: {
                showSearchView = true
                showListView = false
            }, onHomeSelected: {
                showSearchView = false
                showListView = false
            }, onListSelected: {
                showListView = true
                showSearchView = false
            })
    }
    .fullScreenCover(isPresented: $showSearchView) {
        SearchView(viewModel: viewModel, showSearchView: $showSearchView, selectedTab: $selectedTab, showListView: $showListView)
    }
    .fullScreenCover(isPresented: $showListView) {
        ListView(selectedTab: $selectedTab, showListView: $showListView, showSearchView: $showSearchView)
            .environmentObject(viewModel)
    }
    .environmentObject(viewModel)
}

}