The phrase "richer version" refers to an improved or enhanced version of something. It means that the new version has more valuable or interesting features, making it better than its previous version.
Sentences with «richer version»
Chocolate brownie - like a better, richer version of chocolate smooth. (myprotein.com)
If you are looking for a creamy and more rich version, perhaps store bought might be better. (goodgirlgonegreen.com)
I thought I'd create my own healthier and richer version for you to make at home. (theharvestkitchen.com)