public class RotateMarkersByCamera : MonoBehaviour
{
    private OnlineMapsCameraOrbit cameraOrbit;
    private OnlineMapsMarkerManager marker;

    private void Start()
    {
        cameraOrbit = OnlineMapsCameraOrbit.instance;
        marker = OnlineMapsMarkerManager.instance;
        cameraOrbit.OnCameraControl += OnCameraControl;
    }

    private void OnCameraControl()
    {
        foreach (OnlineMapsMarker m in OnlineMapsMarkerManager.instance)
        {
            float markerRotation = m.rotation.y;
            var markerRotationY = Mathf.Lerp(markerRotation, cameraOrbit.rotation.y, cameraOrbit.speed.y);
            m.rotation = markerRotationY;
        }
        OnlineMaps.instance.Redraw();
    }

using UnityEngine;

public class RotateMarkersByCamera : MonoBehaviour
{
    private OnlineMapsCameraOrbit cameraOrbit;

    private void Start()
    {
        cameraOrbit = OnlineMapsCameraOrbit.instance;
        cameraOrbit.OnCameraControl += OnCameraControl;
    }

    private void OnCameraControl()
    {
        foreach (OnlineMapsMarker m in OnlineMapsMarkerManager.instance)
        {
            m.rotation = cameraOrbit.rotation.y / 360;
        }
        OnlineMaps.instance.Redraw();
    }
}