In edit mode, the overlays display the normal of the object hosting the geometry node, but not the ones of the instanced meshes.
Is there a way to force the graph to show the normals of the new meshes instead?
(I mean without instancing mesh lines on the new geometry, to mimick its normals).
I see in the index that the faces / verts are enumerated, but the Edges and Faces sheets are empty (if relevant).
You’ll have to apply the modifier to get those visualizations.
Consider making your own GN ones…
e.g. this is a node-group your can use to visualize vertex normals.
Good luck.
Or a more generic variant, good for any vector attribute like curve tangents and such:
But no, there doesn’t seem to be a proper overlay for this 
Thank you guys, I was almost convinced that there wan’t an alternative but the one you describe, it’s good to know!
Thank you for the node descriptions! 
@[zeroskilz
tried nodes set up but not really working as expected !
you got like an array along a curve ?
can you upload sample file !
thanks
happy bl
