Could I please ask for some advice regarding this image?

It was rejected for contrast - initially I may have thought that contrast would have been 'too low', and so I appealed the photo. My appeal was rejected, with the comments stating that the histogram shows that the dark tones are underexposed. Has my initial thought been wrong, and that there is actually 'too much' contrast? If so, can this be fixed be editing?

Thank you very much for your time!

Kind regards,

Kyle McKinlay