Hello Allan,
Thank you for posting question on Microsoft Windows Forum!
Based on the issue description as well as the provided system logs. The possible causes for this might be Netwtw16 error. Since Windows likely tries to perform background maintenance, updates, or Group Policy refreshes overnight. When it wakes the WiFi card to do this, the driver (Netwtw16) hangs, triggers a failure, and Windows 11—attempting to recover—restarts the system.
The suggestion here is to update the Intel wireless driver (Netwtw16) from the manufacturer’s site or using Intel Driver & Support Assistant to auto-detect updates. Also, try to adjust Power management by opening Device Manager. Find the Intel Wireless adapter → Properties → Power Management and uncheck "Allow the computer to turn off this device to save power".
Another point worth mentioning here is that Fast Startup sometimes causes drivers to get "stuck" in a bad state because it does not actually clear the kernel memory during a shutdown. Try to disable Windows Fast Startup by unchecking "Turn on fast startup (recommended)."
Also, making sure that Active Hours are set to cover the night period to prevent automatic restarts by navigating to Settings → Windows Update → Advanced Options. Disable “Restart this device as soon as possible” if it is set Enabled.
Hope the above information is helpful! If it helps you getting more insight into the issue, It is appreciated to consider clicking "Accept Answer". Should you have more questions, feel free to leave a message.