When tapping anywhere on a Map view, I get a warning "Trying to convert coordinates between views that are in different UIWindows, which isn't supported. Use convertPoint:fromCoordinateSpace: instead." I'd guess it's got something to do with that.

The approach would be to iterate inside the map using ForEach() to add the markers. Add a title string property to IdentifiableAnnotation and display it as such: Map(coordinateRegion: $locationManager.region, interactionModes: .all, showsUserLocation: true, userTrackingMode: .none) { ForEach(courtAnnotations) { item in Marker(item.title, coordinate: item.annotation.coordinate) } }