Some absolutely stellar advice.

Give her the opportunities to express herself in a manner that is respectful. And be respectful of the fact she's learning.

One of the things my DD says her friends complain about their parents is not listening. Not taking their problems seriously and the level of distrust they develop for adults when they realise they aren't perfect. DD is struggling with this herself.

Allow her to have a voice without feeding the negative reactions. And give her alternative reactions. The same way you would with a toddler.

It's a new stage of learning and for you it's going to be less frustrating if you see it that way than her just disrespecting you or your authority. But society makes us believe that's what this is and it's hard to fight against that notion. In the beginning I was doing the same until DH pulled me up and said its not about me. And the way I react isn't helping. And nor can she be patented in the same way we do our younger son.