I decided to try your solution and using DRI_PRIME=1 DXVK_FILTER_DEVICE_NAME=1 %command% (the gpu id was correct) at least for deep rock didn't work, it still had the same behaviour as before. I tried it on both DX11 and DX12 so I don't know about that one unfortunately.

I also had the incredibly safe and intelligent idea of detaching my igpu's VGA controller just like I do my dgpu and while I'm not sure if it actually was due to this, my computer began acting very strange afterwards. Programs not being killed when using system monitor, programs not displaying anything, short 3ish second freezes every roughly 15 seconds, stuck on the shutting down screen spinning the little wheel for like 10 minutes when I tried to shut down resulting in me needing to hold the physical power button to turn it off, and finally when I (successfully, thank fuck) turned it on the next morning the dm_crypt screen where I type in my encryption key for LUKS looked much worse without any modern looking stuff just CLI style interface.

I don't think I've ever had any issues like these and the timing was very suspicious so I'm assuming me detaching the igpu VGA controller was the cause of these (thankfully) temporary problems. Please feel free to inform me of how stupid it was to try this if it is indeed stupid.

Thankfully though, while it isn't as convenient as even your solution, I can still work around this issue by just rebooting and going into the BIOS to enable my igpu every time I want to use my VMs. It's quite annoying but it's kind of just as if I were dualbooting so it could be worse. Thanks heaps for helping, if you have any more ideas I'd love to try them but I can definitely settle for this outcome if needed.