The point is that if you want to dual boot on a gaming laptop with a dedicated graphics card, you have to deactivate the dGPU when you are booting macOS, but keep it activated when booting Windows. Some SSDT/DSDT hacking will be required here. For desktops you will see that online sometimes, but for a laptop I have never seen it. I wouldn't be surprised if it was not possible for a specific laptop with a dGPU, due to some BIOS shenanigans.
In the past, there were some laptops with an Intel CPU and Radeon GPU, where you had the rare case of the dGPU being implemented like a desktop dGPU - and then you could actually use the dGPU under macOS. I think the example was an Alienware laptop with a Radeon 5700M. However, since those laptops are rare, used pricing will be steep and you will have problems finding EFI folders or any kind of help online.
If I was you, I would get rid of the idea to have a dGPU in your laptop. I recently had a pleasant experience installing macOS Ventura on a HP Probook 450 G5 with a i7-8550U CPU. No dGPU, obviously, but for audio projects that should be good enough. That laptop is easy to maintain thanks to a maintenance access door with only one screw on the bottom, which allowed me to work on the wifi card, SSD, and RAM. The wifi card can be swapped for a Broadcom card. You will find a EFI folder for that specific laptop online, but I could also give you mine.
Alternatively, you could build a desktop of course. Last year I built a low cost hack for a friend of mine with two SSDs, one for macOS and one for Windows 10. No SSDT/DSDT hacks required here, since the Radeon 580 dGPU obviously works on both OSes, and Windows drivers for the Broadcom wifi card are available, too.
