Reply To: How Can A Wife Be Yotzei Matanos Levyonim

Also, how does mitzva she’zman grama work on this?

mitzvas asei sh’zman grama is a rule for d’oraisoh’s (and even there not much of a rule, given its several exceptions). The rabanan who made each d’rabbanan decided separately whether to apply it to women. The purim mitzvos expressly apply to women.