Assuming you're not America: the Freedom of Information Act is a 1967 federal law that created a mechanism whereby citizens can request that classified government documents on a topic be reviewed and made public. This is an official list of requests to the FBI for the year 2020. You'll notice that many of them include individuals or organizations who one might suspect are under surveillance, as well as famous historical events and a few conspiracy-theory inspired requests that almost certainly went ignored.

There is a stupid conspiracy theory that TrueAnon is a CIA/FBI plant, mainly because Brace fought with the YPG and his brand of Marxism-Leninism/Maoism isn't exactly the same as various people's on Twitter's brand of Marxism-Leninism or Maoism.

Obviously Braces has a file, but FOIAing for the podcast itself would be to find breadcrumbs of that theory.