Game keeps crashing since downloading Life and Death Expansion Pack

BelindaSenpai  Your dxdiag lists a few serious crashes of the graphics driver, and some crashes of GPU Tweak III.  So please uninstall the latter and restart your computer.

If you get yet another crash, update your driver, which is new enough to not be a problem in theory, but these crashes make updating the next troubleshooting step.  Go here:

https://www.nvidia.com/en-us/drivers/

Select GeForce, RTX 30 series, RTX 3070, Windows 10, and download the Game Ready Driver.  Run the installer as an admin: right-click the download and select "Run as administrator."  Choose the Custom (not Express) install method, and check the box to perform a clean install.  Restart your computer again afterwards and before trying to play.

I would also suggest temporarily disconnecting any USB 3 devices, as the Windows USB 3 driver is crashing too.  This is usually not a serious problem—often enough, simply restarting without the devices connected fixes the issue.  So you can reconnect them after a restart or two.

If you get yet another crash after all this, please look for new errors in the Reliability Monitor.  Hit Windows key-R and enter "perfmon /rel" without quotes, and you'll see a chart of errors and updates with a column for each day.  Today is on the right.

Look for an error that happened at exactly the time of your most recent Sims 4 crash.  If you find one, double-click it to see more details, then copy that info and paste it into a reply here.  If you don't see a new error, check back in an hour or so—the Reliability Monitor doesn't always update right away.