Is it fair that my mom wont let me buy mens clothes?

In my opinion, mens clothes are more comfortable and cuter. My mom just never let's me buy what I want. She says it's too "baggy" and "masuline". Its to the point that I have to go shopping with my friends/grandma to get clothes that I like. She has expressed her feeling about the transgender community calling it a "mental illness." Its like she thinks by me wearing a mens sweatshirt I'm thinking I'm a guy and that "im the third son". I have multiple aesthetics, but the main one is like, "barbie meets dyke" 🤣🤣 I can't dress the way I want and I dont like the majority of my clothes. I don't know what to do or how to talk to her. I feel like she would brush it off, or suspect that I'm transgender, which I am not. Shes the type to be like "you're doing this because of that phone". Any advice would be appreciated 💕💕