Bedwetting pre-op trans daughter wants to wear girls Goodnites but I'm worried about leaks?

She is 12 years old and we support her decision to live as her true self, but the problem is that her "plumbing" is in the front, where the boy's goodnites have extra protection. If she uses the girl's goodnites, the sheet'll get wet and I'll have a lot of laundry. Should I just deal with the laundry so as not to hurt her? Or is this a situation in which I should insist she wear the boys' goodnites?