News max misquotes - missing a word, which can change the context. I took what Ivanka said to mean if a person actually does equal work, they should get very similar pay as another doing that same job. (which to me, in many cases makes sense. A person’s experience etc may also factor in to make differences)
“He will fight for equal pay FOR equal work. I will fight for it too right alongside of him,” she said ...
Listening to Ivanka I thought she was saying that in actual oractice her father encourages families and pays and accommodates mothers who work for him. Being a private business man that is his judgment call.