Dim screen in the initial phase of boot

So I finally got my first Hackintosh working after installing macOS BigSur yesterday. However, now I am stuck here trying to fix this weird issue, where, for the first few minutes my laptop's internal display is extremely dim and unable to light itself up. But after sometime it automatically lights up and works as expected. Anyone knows where things are going wrong ? I suppose something is being loaded at the initial phase and once it's loaded the display works as expected.

Here are my laptop specs:

Laptop: Dell Inspiron 5491 2 in 1

Processor: Intel i7 10510U

GPU: Intel UHD series (Device Id: 0x9B41)

And here is the config.plist.https://drive.google.com/file/d/1yvfNu0AO-pAMGUAv8k894Jh2vuMZlrd2/view?usp=sharing

Brief run down of the config.plist:

- AAPL,ig-platform-id: 0000A53E

- device-id: 9B3E0000

- framebuffer-con1-alldata 01050900 00080000 C7010000

- framebuffer-con2-alldata: 02000A00 00040000 C7010000

As for the Framebuffer-con-alldata
I am experimenting the bus_id's to see which works.

Any help is greatly appreciated! :)