A boundary is a statement about your own actions, what you are willing to do, to engage or not engage in.
No, a boundary is the mark of your limits of how you are willing and able to let others treat you or approach you.
A male, insisting on entering a space where a woman is undressing, and she is not consenting to his presence and experiencing this as a major breach of her privacy and dignity, not to mention additional reasons such as trauma, disability, faith, culture and belief, is yes, violating her boundaries.
In order to meet his own needs. Which is to use her in this space. Whether as a prop or a validation tool or for any other means is irrelevant: he wishes to make use of her and does not see her consent as relevant or her humanity as equal to his.
I mean how many boundaries do you want violated in one action? There are multiple there.