No, it is under the Surface>SubD tab, (and only if you have your update frequency set to Release Candidate and have downloaded the latest version of Rhino 7)
about optimizing the distribution, one way would be something like this:
tetrahedral_lattice.gh (15.3 KB)
It packs spheres into the volume, then takes the Delaunay tetrahedralization of their centres (using the MeshEdit plugin). This way you avoid the short segments and small angles you get from the Voronoi of non optimised points.
