Well...starting with the easy parts, try using HWINFO64 to monitor and write CPU/GPU temperatures to a file (in case it's a heat related shutdown) and memory usage (in case there's a memory leak in the game).
After that, all I can think of is to install Windows Debug utilities from the Microsoft Store. That can read your memory dump file if it exists and tell you the last thing your computer was doing before the crash. I found a problem with an audio driver a long time ago using this. I looked at the very last DLL it accessed before the crash and it was related to my audio card.
