I think when playing condifently he has shown he can do this. However he's been a bit withdrawn in his comfort on the ball and taking his time. At Bilbao and when he first came to the club he was confident in that area. In fact he had his signature move where he's receiving a pass and seems to let the ball go one way and then chops it in front of him with less predictable movement that often beat the man looking to pressure him as soon as he received the ball. Things like this that hes shown in the past, he doesnt show as often anymore. Meanwhile his aggressive closing down and tackling got a lot better.
So its all in there, but he hasnt been putting it all together.
You have also focused on just 1 aspect of the role. On the ball. Which is the one most people seem to focus on when they're watching it seems. When we didnt have the ball and Ander was playing as the DM, he would win the ball and play passes but occasionally he would be out of position to help the backline when the opponents attacked. Thats something Matic has had happen this season too. Ander wasn't any better at it and again, he only played this DM role a few times. But for example against Chelsea last season when he did, he was very good on the ball and he won the ball a bunch but thats where he came up short. Making sure he was in the best position to help out the defence.