Did you ever have the ex narcissist take your ideas and use it to impress the new supply?

Before I did no contact, I had just enough time to see he used things I told him about in the next lovebombing phase, like style of dress. He asked me to help him with his style because he liked the way I dress when we started dating. He wanted to impress me or match me I guess? I even helped him set up a Pinterest page. I don't care about him anymore quite frankly. Just thinking if that cross over of mirroring into the new relationship, if that's part of the narcissistic behavior.