I would get too excited yet. The boxes containing unfilled ballots could be nothing more than the excess ballots that were not used in the 2020 election.
I know it is hard to wait, but soon the audit team will announce the hand count of the filled ballots.
Remember printers print with an embedded microcode. If the blank ballots are printed on a printer that is not matching with the known printer list it would be another indication of a fraudster in the woodpile.