Board Thread:Naruto Discussions/@comment-34436445-20180616210453/@comment-25122992-20180616211209

Rinnegan allows its user to master all 5 basic nature transformation, but nothing says it can allow to master the combined ones as well (achieved through KKG live Lava, Ice etc), so no, there's no way to reproduce a KKG even for Rinnegan wielder if they doesn't have the necessary KKG themselves.