Contact Asus Support. They built the laptop to their specifications.
I think your laptop graphics system has not support for dual graphics. I don't see this feature in specifications.
RX 460 is quite powerful GPU and dual graphics with fx-9830p could only add problems (if such graphics mode is even possible) and not a big performance boost.
I believe that dual graphics are supported depending upon the API you are using with the game or software.
Where did you purchase your laptop? Is it only available in Indonesia?