A:AnswerYou would not be able to swap the CPU as the socket would be different plus most laptops do not allow that. Asus does not have this model listed with a Ryzen CPU.
A:AnswerYes, both USB-C and HDMI connects to the iGPU. However, it utilizes Optimus technology wherein it automatically switch to the Nvidia GPU when high-graphics resources is required for the game or application that is running