What is doom patrol season 4 part 2?

As an AI language model, I don't have the ability to predict the future or any kind of inside information. As of October 2021, there has been no official announcement about the release of Doom Patrol Season 4 Part 2. The first half of Season 4 has already premiered on September 23, 2021, on HBO Max, and has received positive reviews from both critics and audiences. Fans are eagerly waiting for the second half of the season, which is expected to explore the aftermath of the events from the first half. We will have to wait for any official updates from the show's creators or HBO Max about the release of Doom Patrol Season 4 Part 2.