Giuliani has been hampered by acting as a personal lawyer without the law enforcement authority typically needed to prosecute criminal cases.
If that starts to change as these cases proceed, there is direct evidence to determine whether a batch of ballots was handled by individual voters or whether it was fake.
A stack of ballots submitted by voters should have an individual set of fingerprints on each ballot in addition to the people who handled the ballot. A stack of fake ballots should have only the fingerprints of a small group of people. With an entire box of ballots, the difference should be stark. This applies to all states with questionable late ballots.
Just remember that Rudy's lawsuits are smokescreen to buy time. Sidney's is going to be leverage to put pressure on Dems. But the real stuff is due Dec 13th from DNI.