>>41692330 classical scholars (Mufassirun) interpreted 65:4 as a medical condition tho. Go open Tafsir Ibn Kathir for 65:4 right now. He explicitly writes: 'the same for the young, who have not reached the years of menstruation'
As for Nisa 6, you are lying again. 'Most scholars' absolutely do NOT say mental maturity is a prerequisite for a marriage contract. All four classical Sunni Madhhabs (schools of jurisprudence) unanimously agree that a father (Wali) can contract a marriage for his prepubescent daughter before she reaches puberty. Nisa 6 is about when orphans get access to their bank accounts/wealth, not when a Nikah is valid.