The Story - To be clear though, I first heard this on John Oliver's show.
Most of the articles on this are at least 2 to 3 years old, so not certain on where this currently stands now. That being said, this article, has 1 pretty damning fact on it.
CLAIM: “AT&T has never had a financial interest in OAN’s success and does not ‘fund’ OAN.”
FACT: No one would have any financial interest in OAN were it not for AT&T's early and ongoing support for the company. Per Reuters, "Ninety percent of OAN’s revenue came from a contract with AT&T-owned television platforms, including satellite broadcaster DirecTV, according to 2020 sworn testimony by an OAN accountant.” If that’s not what “funding” something looks like, I don’t know what does.