These are the histograms of a similar print using an Epson R3000.
From left to right: aRGB-print RGB levels that were scan corrected, aRGB-print green channel and sRGB-print green channel
FWIW, note that I 'scan corrected' the white and black point in these and only the black point in the previous illustrations.
This had the result of stretching these histograms slightly more to the right, or more accurately stated, had the unintended result of NOT stretching my original scan histograms enough.