You can read out a lot of hardware information. Some automatically as text or graph. For some hardware information like CPU/GPU utilization, Powershell is run in the background.
Other programs can be started via Blueprints. For example, you can also run the ping command or start all possible .exe files.
I took benchmark values for CPUs and GPUs from the Internet and converted them down to a scale from 0 to 100. Based on this score, you can automatically set graphics settings or calculate the hardware requirements.
With this plugin you can open the Windows file dialog to choose a file or directory. Version: 5.1 Home Page: https://www.unrealengine.com/marketplace/en-US/product/hardwaremonitor