Issues with handling and performance after re-enabling iGPU

When I set up my laptop, I chose to disable the iGPU (integrated graphics card). Now that I have re-enabled it, several things have been functioning extremely poorly

Rendering processes run extremely slowly
It is difficult to load images
Dedicated GPU is almost never used

For example, I was playing a graphically intensive game that I could previously run at >100 frames per second at 1440p, but after re-enabling the iGPU, I can barely get 5 fps. I have changed the UEFI bios, Nvidia control panel, "Predator Sense", and windows display settings.

Interestingly, the iGPU, which should be listed as GPU 0 in Task Manager, is nowhere to be seen:

Device Manager doesn't show it either:

I am led to believe that the dedicated GPU isn't being used, or is used rarely at all.