I thought Sarbanes-Oxley, which added a lot of reporting/disclosure requirements for public companies and was passed in the wake of Enron and Worldcom scandals

I thought Sarbanes-Oxley, which added a lot of reporting/disclosure requirements for public companies and was passed in the wake of Enron and Worldcom scandals in the early 2000s was the primary driver behind the drop in IPOs? What provisions in Dodd frank are there that effect this?