Miwa remains alive in the JJK manga. There are no events or plot developments that lead to her death. It's possible you might have misunderstood or there's a mix-up in your sources.
No, Miwa didn't die in the JJK manga as of the latest chapters I know.
As of the latest chapters I've read, Todo is still alive in the JJK manga. The story hasn't depicted his death yet.
Megumi is not dead in the JJK manga. The manga continues to feature him and his adventures. The story hasn't reached a point where his character is killed off.
Sorry, I don't know exactly how Haibara died in the JJK manga. It's best to keep reading and discover it for yourself as the story unfolds.
No, Gojo doesn't die in the JJK manga. His fate is still unfolding in the ongoing story.
Yes, Nobara tragically dies in the JJK manga.
Well, it's hard to say. The story is full of surprises and twists, so it's difficult to predict Maki's fate exactly. You might want to keep up with the latest chapters to get the definite answer.
As of the latest chapters, Choso is still alive in the JJK manga. The story keeps evolving, and his role remains significant.