Get position from Isometric TileMap

I really getting frustated about that, i cant get it to work... but in default TileMap(ex: topdown 2d) is working fine.

(get this code from internet)

get position and store in a dictionary:

 tiles = new Dictionary<Vector3, WorldTile>();
         foreach (Vector3Int pos in Tilemap.cellBounds.allPositionsWithin)
         {
             var localPlace = new Vector3Int(pos.x, pos.y, pos.z);
 
             if (!Tilemap.HasTile(localPlace)) continue;
             var tile = new WorldTile
             {
                 LocalPlace = localPlace,
                 WorldLocation = Tilemap.CellToWorld(localPlace),
                 TileBase = Tilemap.GetTile(localPlace),
                 TilemapMember = Tilemap,
                 Name = localPlace.x + "," + localPlace.y,
                 Cost = 1 // TODO: Change this with the proper cost from ruletile
             };
             
             tiles.Add(tile.WorldLocation, tile);
         }

my test, click on tile and set color to green:

 private void Update () {
         if (Input.GetMouseButtonDown(0))
         {
             Vector3 point = Camera.main.ScreenToWorldPoint(Input.mousePosition);
             var worldPoint = new Vector3Int(Mathf.FloorToInt(point.x), Mathf.FloorToInt(point.y), 0);
 
             var tiles = GameTiles.instance.tiles; // This is our Dictionary of tiles
 
             if (tiles.TryGetValue(worldPoint, out _tile)) 
             {
                 print("Tile " + _tile.Name + " costs: " + _tile.Cost);
                 _tile.TilemapMember.SetTileFlags(_tile.LocalPlace, TileFlags.None);
                 _tile.TilemapMember.SetColor(_tile.LocalPlace, Color.green);
             }
         }
     }

but this get other tile or none... plis help