None. At least not to date.
Product Management is a complex role and many recognise that it's a role you cannot learn in a classroom - it requires real on the job experience. This is why you see APM programs that span multi-year all dedicated to coaching and mentoring you to become a Product Manager.
However in saying that if you're looking to break into product, a certification doesn't hurt. It shows an eagerness to learn and invest in your own career development. As well as putting another reference to skills you've obtained in that area.
But for skilled Product Professionals, the vast majority I know do not have a formal degree and nor do they need it - some consider taking an MBA as the next step in their cert/degree learning cycle but again not necessary in my experience.
If anything the places you've worked at and whether you've worked in a product-led/friendly companies carry much more weight than any certification does.