Hi,
How to display edges group membership in the Geometry Spreadsheet ?
Seems Edges attributes are in vertices but where's the groups one ?

I don't find anything about showing of edge group in Spreadsheet.
You can convert your edge group into point group and then use Spreadsheet.

Edges technically don't exist. Well, not in the same way as
points, verts, and prims.

Edges are a by-product of prims. You only need points and verts
to create a prim, edges a the red-headed step child.

If you look at the pattern in your group node, after you created
your group of edges, you'll see it's just referring to the points
that the edges belong to.

What do you want to be able to do/see?

Cheers

Lewie