I learned that the Harav Tzvi Yehuda Kook zt’l felt that girls should wear sleeves that went to their wrist (not just that covered their elbow) - is this true? What is today the excepted practice in the merkaz harav kehila?

Such is the rumor. A woman who can comply with this with no difficulty - may be blessed. I cannot say how most of the community acts. Rabbi Zalman Baruch Melamed