Moving the child should have already happened; the fact that he wasn't moved away from her means the teacher isn't taking it seriously.
Sensory issues/autism isn't a good excuse to not move your DD away: she doesn't like being touched, and she shouldn't have to put up with it because he wants to touch her.
Teacher can give him something sensory to hold and touch and stroke. It should not be your daughter or any other child.
Our reception class has a black boy, the only one in the class. There are a few children that keep touching his hair and rubbing his head without his permission. Repeatedly. Without asking. And he doesn't like it. And he tells them to stop. And they don't on their own. I have made it very clear to them that this is not acceptable for the same reasons your daughter shouldn't have to put up with it. And when I see them doing it to him and him getting upset, I move the children away from him and explain again why it has to stop.
If I didn't take it seriously, and if I wasn't moving children away, I wouldn't be at all surprised if his parents told me they would tell him to push them to get them off of him soon ... but I am on it, so it shouldn't ever come to that.
Your school needs to be more responsive to this.
You don't get to touch other people if they don't like it, no matter who you are or how curious you are. You just don't. Not even 4 and 5 year olds. And if it needs to firmly and repeatedly explained, so be it.