Matte paint/matte paint cannot be polished due to its characteristics. When polished, it scrapes off the small irregularities that create the unique atmosphere of the mat. It will be glossy. It is possible to remove small scratches and stains by polishing with normal painting, but matte painting / matte paint is not possible.
That’s why it’s a good idea to apply a matte paint / matte paint special coating to protect your new car while it’s still clean.