Passing iteration reference to Leaflet callback

Question

I am trying to write a method that creates Leaflet markers with a function updateRoute which should be called whenever the marker is moved.

My problem is that I can't find the index of the marker that was moved as the wayPointIteration variable is evaluated as the total number of markers. I understand why it doesn't work like that now but I don't know how the method can be executed with knowledge of the iteration of that marker.

function updateWayPointsOnMap() {
    let options = {draggable: true};
    let wayPointIteration = 1;
    
    getRouteWayPoints().forEach(wayPoint => {
        let newMarker = L.marker([wayPoint.lat, wayPoint.lng], options).bindTooltip("Way point " + wayPointIteration).addTo(map)
            .on('move', function updateRoute(move) {
                getRouteWayPoints()[wayPointIteration - 1] = move.latlng;
                updateMap();
        });
        routeMarkers.push(newMarker);
        wayPointIteration ++;
    });
}