Mini pc crashes and restarts when playing game

silverberry23​  I've merged your new post with your previous thread.  Please stick to one thread while troubleshooting.  I stand by my previous post even if you don't think temperature is an issue overall—at the very least, it's something to test separately whenever you change anything about the cooling, even if it's just removing and reapplying thermal paste.

Your dxdiag shows four different types of BSODs, all dealing with misbehaving drivers, but the errors don't list which driver is responsible (this is normal).  I could find out by looking at some crash dumps.  But given that the bug check codes are all over the map, I think it's better to start with a repair install of Windows.  (This is not a clean install but does refresh OS files.)  Here's how to run one:

https://www.elevenforum.com/t/repair-install-windows-11-with-an-in-place-upgrade.418/

Once you've done that, run Microsoft's Driver Verifier:

https://learn.microsoft.com/en-us/windows-hardware/drivers/devtest/driver-verifier

It's mostly a tool for developers testing new drivers but can help here too.  Choose the "automatically select all drivers installed on this computer" option and let it do its thing.  Let me know what you find.

When testing Sims 4, please keep your Mods folder removed.  The one game crash in your dxdiag is most often caused by bad mods or custom content, although there are other causes, and it wouldn't surprise me if in this case it had more to do with the OS issues than the game.  If you do get another crash, I'd like the Reliability Monitor info I listed in my previous post, but only for errors that happen after you run the repair install and Driver Verifier.