I'm Having Product Schema/Rich Snippet Issues (Need Help Fixing)

I’ve had my rich snippet missing in Google search for over a month now for a specific product page, I believe my product schema wasn’t implemented in correctly. I just recently added the RankMath plugin since it provided Schema. Now I have 2 sets of schema for 1 product, RankMath’s schema markup has less errors than my original schema markup. When I run the Google Rich Snippet Test, my star ratings aren’t showing in the preview. So there’s issues that need to be fixed.