No, Brianna is not leaving. Furthermore, there has been no official announcement of the journalist leaving CNN.
Also, looking into her social media, Keilar has still described her bio as an anchor of CNN. Moreover, she recently talked about the podcast of Joe Rogan for misleading information.
The journalist has been sharing different CNN tweets on her Twitter account. She is available on social media with the username Brianna Keila.
Till now, she has 340.6k followers with 8,400 tweets. Keilar seems to be doing pretty well with her professional career, with no plan of leaving the network.