In 2021, the Supreme Court declined to hear a case challenging the constitutionality of it, in part because the court found that Congress was activly looking into it. According to the court, in 2020 a congressional commission tasked with looking into it advised eliminating the male only selective service.

Congress almost did so, to the point where both houses of Congress approved a draft bill that would; however the provision was dropped before a final version was agreed to.

For a country that has not had a draft in half a century, that is a suprising level of controversy.

https://www.supremecourt.gov/opinions/20pdf/20-928_new_i4ek....