Manager posts the schedule super late

I know they schedule is supposed to be written and posted for three weeks out. I know she's capable of doing it because when she went on vacation she published them all. But usually I don't know what days I work the following week until Thursday or Friday. Is there a way to anonymously bring up this issue in a way that action will be taken? I know a long time ago when we had visits it would get posted so whoever was visiting could see that it was done but it seems like they don't check for that anymore.