Strictly speaking, manga is a Japanese comic book. Often in black and white, the comic is read from right to left (this is the original meaning). The word "manga" is, by extension, used to designate other products of Japanese culture reminiscent of the manga graphics of the famous comic strip. The manga style can be found in many anime and video games (PC, consoles and of course, mobile manga games).
Manga video games are often adapted from anime, which in turn are adaptations of comic books. But this is not always the case and the reverse is also possible. The good thing about the manga theme is that you can find several styles of mobile games. For example, among the games adapted from manga, you can find multiplayer games, RPGs and strategy games. One game that is very popular with many players is Summoners War. There are also games with a slightly different graphic style, as is the case with Arknights.
If you can't find what you're looking for in the Manga style video games, find all the Mobile Games categories and find your new hobby!