The US Supreme Court absolutely does enact things. For example, "tests" to interpret some other law or policy, which then gain the force of law. Or sometimes

The US Supreme Court absolutely does enact things. For example, "tests" to interpret some other law or policy, which then gain the force of law. Or sometimes directly, as in "it would be discriminatory not to do X", and then everyone needs to do X. It would be more proper to say they can't enact something except in the furtherance of another compelling interest.