Delaunoi is available as a free plugin for Adobe XD.
Installation and a playground file to get started are here ->
Points are produced exactly on the positions generated under Data Points. They are direct representations of these data points.
Possible forms are ellipse (default), rectangles and polygons. When polygon is selected a triangle (polygon with 3 edges is created). There is an option to change that later in XD.
For an ellipse Size defines the diameter. For rectangle and polygon its width and height. As a rectangle always produces a square.
Fill and Stroke are the same for points, triangles and cells.