I think this is a possible explanation. Even in this case she really wouldn't understand the enormity of who He is which would explain why she would feel comfortable rebuking Him, or trying to exercise authority over Him by ordering Him to turn water into wine.
I know what you’re saying in general. I guess I never thought she was “ordering” Him to turn the water into wine at the wedding. I always remember the story is that she asked Him to do it, and then went to the others helping at the wedding to “do whatever He tells you.”
But part of the human experience was being a parent, and even though Jesus knew who He was, He was also her child. And she would be “mom” to Him. Many moms had prophets with powers from God, and I am sure she felt a lot of similarities that those mothers had with their sons. But when you see your prophet son crucified what are you to think, has something really gone wrong? How does God get the victory by dying a criminal’s death? No doubt she, like the Apostles, began to fully figure this out after His resurrection.