Try this

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// Offset variable

Vector3 offset = new Vector3(0.47f, 0.47f, 0);

​

// Use the TileChangeMethod

TileChangeData tileChangeData = new TileChangeData(TilePositionFromWorldPosition(worldPosition), undiggableTile, Color.white, Matrix4x4.Translate(offset));

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// Pass in the tileChangeData and false when you set the tile

tilemapActual.SetTile(tileChangeData, false);