Two of the precedents that RvW is based on addressed that directly. And in those decisions, it was struck down as unconstitutional.
So if the states try it, and SCOTUS denies a challenge or doesnt uphold the precedent, they'll continue to unravel settled law.
Griswold v. Connecticut (1965)
Connecticut's laws against distribution of contraceptives and contraceptive information to married couples are struck down, with the Court relying on earlier precedent involving the rights of people to make decisions about their families and procreation as a legitimate sphere of privacy.
Eisenstadt v. Baird (1972)
The right of people to have and know about contraceptives is expanded to unmarried couples, because the right of people to make such decisions exists due not simply to the nature of the marriage relationship. Instead, it is also due to the fact that it is individuals making these decisions, and as such the government has no business making it for them, regardless of their marital status.