From the IG report: The Special Counsel records officer "reviewed Strzokās DOJ issued iPhone after he returned it to the SCO and determined it contained no substantive text messages."
The report you cited appears to have been the interpretation of one Rudy Giuliani. Seems to have been Mayor of NYC. Might not be fully credible.
Carry on with your vendetta against the Deep State, though. Fully infiltrated (whatever the hell that means)!