I’ve managed to place the angle dimensions at appropriate positions on the seam between each pair of faces. (white group) It was a little more difficult than I expected… 
hexagons_2024_Jul21ee.gh (113.1 KB) DEPRECATED
I’m still not sure they are positioned correctly but they are very close.
P.P.S. Sorry, second update to this post. Based on this close-up image (below, and careful reasoning, of course), I think this one is more correct. The angles have always been accurate, it’s the positions of the arc dimensions that have been difficult. (version ‘Jul21f’)
hexagons_2024_Jul21f.gh (113.4 KB)
August 5 - Aaaarrrrgggghhhh! 
What happened? After that, you ghosted me 
Before I forget, I’ll post this which replaces Scale with Offset Curve. I think it looks better. I also puttered with labeling the OpenNest parts but failed to make any breakthrough so stripped that code out,
hexagons_2024_Aug5a.gh (103.0 KB)