He has only started once - during a league match against Rayo Vallecano. In all other games, he has come on as a substitute.
There are several reasons why coach Flick is reluctant to use him as he did last season, when Olmo was a key figure. First and foremost, this is due to the player's current form: he has not scored a single goal and can boast only one assist, which is not enough for a player of Olmo's exceptional talents.
Another important factor is the fierce competition for his place. Although Olmo can adapt to different positions, he is best seen as an attacking midfielder, where there are many options. His main rival is Fermín López.
Dani's problem is that he has not used his opportunities to the fullest. In the Champions League matches against Newcastle, he had excellent chances to score, but failed.