Controller Support for Once Human Mobile is possible, but you have to wait
Now, it’s becoming more blurred as to where mobile games end and PC games begin. Developers of mobile titles are even adding controller support for a smoother player experience, but unfortunately, this isn’t the case with Once Human mobile yet. However, there’s good news! One of the admins from the official Discord server reported that the creators have confirmed they will add controller support in the game at some point in the future. For now, though, their primary focus is on optimizing the game, especially improving its performance. Keep in mind that this information comes from a source that’s a year old, so plans can change.