As the owner of a laptop from the same company, I recommend doing this, and then using any online instructions to disable the Nvidia GPU.
From experience, I recommend this: GitHub - bayasdev/envycontrol: Easy GPU switching for Nvidia Optimus laptops under Linux · GitHub. It requires installation in dom0, reliably disables the GPU, and after using it, my idle temperature dropped from 86 to 40 degrees Celsius.
I couldn’t find a way to disable the Nvidia GPU without rebuilding the kernel. Various flags hide the GPU from dom0, but it still runs, consumes power, and for some reason gets very hot.
I also recommend disabling CPU boost. This is a one-time operation with some Xen command; ask AI or check the Xen Power Management documentation.