The fact that the whistleblower is going public at a somewhat unknown network "NewsNation" either throws shade over the story or perhaps is a sign that no one believes the whistleblower.

At first, I couldn't really find a reputable source about this, but there is this new york mag article[0] which cites him (which cites the debrief article another comment shared), so there's that.

[0] https://nymag.com/intelligencer/2023/06/ex-intel-official-go...