Well, as far as I know, the continuation of the Darling in the Franxx manga is a bit unclear. It could potentially continue depending on various factors like the popularity and the creator's plans.
Overall, the Darling in the Franxx manga is relatively consistent with the anime. Some characters' expressions and minor plot points might vary, but the core story remains the same. It's more like two sides of the same coin.
The main themes in 'Darling in the Franxx' include self - worth. The characters struggle with their place in society and how they are valued. Also, friendship and loyalty play a big part as the characters fight together and rely on each other. And of course, the theme of growing up and maturing is quite prominent as they face various challenges.
The anime 'Darling in the Franxx' is not for all ages. It delves into themes like self - discovery, relationships, and there are also some action - packed and intense mecha fight scenes. Additionally, the way the characters' relationships develop, especially the romantic aspects, makes it more suitable for an older audience, say, teenagers and above.