From what you write, may I assume that you would want the Federal Reserve to be audited? Transparency would put an end to a lot of “conspiracy theories”, after all.
There is a weekly report of the Fed’s activities published in Barron’s for those with a burning desire to see what the Fed has been doing. During the Carter years bond traders hung on every shred of information coming from the Fed and the market would fall if there was a whiff of credit expansion.
Conspiracy fans are going to be bored reading a Fed audit. Short sellers OTOH should find an audit useful because it will tip them off about banks under stress that are needing to borrow from the Fed. Since the Fed is not keen on helping ruin their member banks they aren’t interested in supplying that sort of information.