The justices did not decide whether the Texas law violates the Constitution. That issue was not presented in the case, but the decision Friday clears the way for the issue to be litigated in the state. Because the law clearly violates existing Supreme Court abortion precedents, the challenges are likely to prevail." The question of courts and the AG were a matter of who the appropriate person to sue would be. As long at there's A defendent, challenges to the law can proceed.

https://www.nbcnews.com/politics/supreme-court/supreme-court-says-challenge-texas-near-total-ban-abortion-can-n1285732