Question Why my mainboard bus speed is wrong?

[Enrang]

Hello everyone, by comparing my laptop CPU-z with someone who bought the same identical model on Amazon, I noticed an issue on mine, the mainboard PCIe version is 3.0 while it should be 4.0:

https://imgur.com/a/uWUcaKx

This is not the only issue I am having with this laptop (idepada 3 gaming 15ach6), for example I have issues with the dGPU not being detected with d3cold state support disabled.
dGPU issue reddit

Maybe the two things are connected, any idea? Thanks