My bad, I found the answer here with the search terms in category Geometry “surface.pointAtParameter”:
[Spreading points on a line]
Adding the flatten node to each output of the code block [U,V] did the trick, and now there are a grid of points defined on the surface. As seen here in this image of my workspace:
Well the image export did not capture the background but you can see the flatten nodes at the end of the code block.
Thanks