The Federal Reserve Bank is not a US governmental institution. even though most Americans think it is. This has been a fallacy perpetrated on the American people for almost 100 years now.
It is independent of the US government but through some nonbinding laws is somewhat accountable to the US Congress but has never been audited or truly overseen by the Congress.
The chair and board of governor's staff testify before Congress and submit a Monetary Policy Report twice a year. Independently audited financial statements and FOMC meeting minutes are public but they are only superficial to reality.
In reality, it is a cabal of bankers that have had free reign to print money out of thin air for almost 100 years. They then charge the American people interest on that creation of money. Not a bad gig if you can get it.