How to draw a circle on the map?!

using System.Collections.Generic;
using UnityEngine;

public class DrawCircleUsingPoly:MonoBehaviour
{
    public float radius = 64; //pixels
    public int segments = 16;
    
    private OnlineMapsDrawingPoly poly;
    private List<Vector2> points;
    private OnlineMaps map;
    private OnlineMapsMarker marker;
    private Vector2 markerPosition;

    private void Start()
    {
        map = OnlineMaps.instance;

        // Init points
        points = new List<Vector2>(segments);
        for (int i = 0; i < segments; i++) points.Add(new Vector2());

        // Create poly
        poly = new OnlineMapsDrawingPoly(points, Color.green, 3);

        marker = map.AddMarker(map.position, "Center of circle");
        markerPosition = marker.position;

        // Draw circle
        UpdateCircle();

        map.AddDrawingElement(poly);
    }

    private void Update()
    {
        if (markerPosition != marker.position) UpdateCircle();
    }

    private void UpdateCircle()
    {
        float r = radius / OnlineMapsUtils.tileSize;
        float step = 360f / segments;
        double x, y;
        marker.GetPosition(out x, out y);

        // Old way (Online Maps v2.3):
        // OnlineMapsUtils.LatLongToTiled(x, y, map.zoom, out x, out y);

        OnlineMapsProjection projection = map.projection;
        projection.CoordinatesToTile(x, y, map.zoom, out x, out y);

        for (int i = 0; i < segments; i++)
        {
            double px = x + Mathf.Cos(step * i * Mathf.Deg2Rad) * r;
            double py = y + Mathf.Sin(step * i * Mathf.Deg2Rad) * r;

            // Old way (Online Maps v2.3):
            // OnlineMapsUtils.TileToLatLong(px, py, map.zoom, out px, out py);

            projection.TileToCoordinates(px, py, map.zoom, out px, out py);

            points[i] = new Vector2((float)px, (float)py);
        }
    }
}

using UnityEngine;

public class DrawCircleWithRadius : MonoBehaviour
{
    public GameObject circle;
    public float diameterInKM = 0.5f;
    public float sizeY = 0.02f;

    private OnlineMapsMarker marker;

    private void Start()
    {
        marker = OnlineMaps.instance.AddMarker(OnlineMaps.instance.position, "Marker");
    }

    private void Update ()
    {
        circle.transform.position = OnlineMapsTileSetControl.instance.GetWorldPosition(marker.position);

        OnlineMaps api = OnlineMaps.instance;

        Vector2 distance = OnlineMapsUtils.DistanceBetweenPoints(api.topLeftPosition, api.bottomRightPosition);

        float scaleX = diameterInKM / distance.x * api.tilesetSize.x;
        float scaleY = diameterInKM / distance.y * api.tilesetSize.y;
        float scale = (scaleX + scaleY) / 2;

        circle.transform.localScale = new Vector3(scale, sizeY, scale);
    }
}