What are some otc supplements that can help with reversing pcos/ managing symptoms/ help with fertility?

There are no such products. Supplements are dietary additives that are by law not monitored by the FDA unless they start killing/injuring people. They are not required to prove any of their claims, or the true content of the product sold. Consumer beware. Some people may find certified supplements help when their diet is not balanced ot they have a true deficiency.