As of the latest chapters I've read, Megumi is still alive in the manga. Usually, such major character deaths are significant plot points and would be well-publicized if they occurred.
Typically, megumi fanfic often focuses on his personality traits. His stoicism and determination are often highlighted. For example, in many fanfics, his unwavering resolve in the face of danger is a central theme.
Well, Megumi's story in the manga was full of twists and turns. She had to overcome various obstacles, and there were also some unexpected developments in her relationships with other characters.
Nope, Megumi is alive. The author has chosen to keep Megumi's character alive to continue developing their story and interactions within the manga's world.
The ending of Ah Mai's enlistment was that she left the army, returned to being a woman, lived in seclusion, and finally found her own happiness. Ah Mai ended up with Tang Shaoyi. As she grew up, she also met two other men who were important to her. One was Shang Yizhi. She had helped him escape from his predicament many times. Their fates were intertwined. She had also helped him find himself and achieve great things. The other was Chang Yuqing. They fought on the battlefield, but outside the battlefield, the two of them experienced life and death together and knew each other. Although Ah Mai had left the army, she still loved Tang Shaoyi deeply, and Tang Shaoyi had always been worried about her. Shang Yizhi finally ascended the throne and became the emperor. As for the other characters 'endings, the search results did not mention them.