My dGPU + eGPUs system will not allow a M.2 eGPU to accelerate the internal LCD
If you don't have an external monitor, no iGPU, you shouldn't use the M.2 interface! Use the TB3 interface.
You have a less-common Nvidia dGPU + eGPU system. There is no iGPU.
eGPU-accelerated internal LCD mode works on iGPU + eGPU systems be that by Nvidia Optimus or Windows 10 hybrid graphics.
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