Think the playing time narrative can only be regarded as agent talk. Given his age, Nwaneri's had a proper breakout season and will surely feature in Arteta's plans.
The main issue for him is learning to play a more influential role and that's his responsibility: he should be targeting becoming Ødegaard's understudy as much as Saka's but he doesn't quite have it in him yet. Better him than Vieira, who's back in the mix after Porto happily let him return from loan.