Premiere Pro using Integrated and not Dedicated Graphics Card
I have GTX 1660 Ti and it cannot detected by Premiere Pro. It's using iGPU. I disabled my iGPU on BIOS. I'm using desktop PC btw. And now it seems it isn't using iGPU or dGPU either. It uses only my CPU. And in export settings, "Software Only" is avaible. Where's hardware acceleration? There is not. I updated my GPU to last driver on GeForce Exprience. I checked GPUSniffer, it detect my GPU but it isn't avaible on program.

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Kyle Plumadore (Adobe) commented
The hardware encoding settings you are showing controls whether intel quicksync is available/used - which is separate from whether CUDA can be used to assist with rendering. You want to look in Project settings -> General -> Renderer to see that CUDA is selected there.