Not sure why the OG is so low. I would blame the hemp seeds, but those were not added until the boil.
Based on boiling 9.20 gallonsliters at 1.056 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.062. You wanted an OG of 1.063. It looks like it will be under.