It's a stretch but could he be thinking of converting him to a central mid? Following in the footsteps of Mousa, another converted winger with low goal/assist numbers. He has a bit of that same strength/dribbling/ball protection.Doesn't make sense at that price, especially with the injuries.
Conte seems to love him, but what's he seeing? Zaniolo isn't going to suddenly post Deki level goals/assists. Maybe he has a deeper role in mind but I don't really see it.
With Mousa we used to be able to give it to him anywhere and he'd find a way out of the pressure. Joelinton a bit similar as another physically strong dribbler doing well in the midfield. But you wouldn't pay £40mil on an experiment like that, surely.