Disabling dGPU - Cannot find _INI/_OFF on DSDT and SSDT

I trying to disable dGPU for a better battery. I'm following these two tutorials.

• Disabling discrete graphics in dual-GPU laptops (by RehabMan)
• How to Disable Discrete Graphics in Dual GPU Laptops (NVIDIA/AMD)

So I tried to find _INI and _OFF of my dGPU, but I couldn't find any. Help needed.

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Attached these files here

• DSDT/SSDT .aml / .dsl files
• Output of 'ioreg -l' (ioreg.txt)
• (Linux) Output of 'lspci -vvnn'

IODeviceTree of ioreg shows dGPU on PCI0.PEG0.GFX0 (see vendor-id and device-id)

IODeviceTree - IORegisteryExplorer

PC spec

• Laptop model: MSI gf63 8rc (i7 model)
• CPU: i7-8750H
• GPU: GeForce GTX 1050 (mobile, muxless)