The "Reset this PC > Keep my files" option deletes the system files and reinstalls them without formatting the system partition, keeping your files. The drivers are included in the system files, so it removes the third-party drivers.
If you want to do a clean install, you need to create a USB installation drive using the Media Creation Tool, boot from the USB drive, format the system partition, and select it to install Windows.
Media Creation Tool:
https://go.microsoft.com/fwlink/?linkid=2156295
Let me know if you need more information so I can help you.