Mac mini m1 restarts randomly time to time.

That is a kernel panic.

It could be due to some hardware failure, or a conflict caused by some third party kernel extension or daemon.

Please run Etrecheck and post its full report here. Use the "additional text" button and paste the report into the text box.

Major Issues:

Anything that appears on this list needs immediate attention.

Automatic updates disabled - Automatic updates are disabled. This computer is at risk of malware infection.

Security updates disabled - Security updates are disabled. This computer is at risk of malware infection.

Kernel panics - This system has experienced kernel panics. This could be a sign of hardware failure.

Heavy CPU usage - Some processes are using an unusually high amount of CPU.

Apple security disabled - Apple security software is disabled. This computer is at risk of malware infection.

As already obvious, there have been some kernel panics.

That security updates and Apple security are both disabled is not a good idea.

I will go through the rest of the report and will come back soon.

[EDIT: are you running some of the things below in a Docker?]

Launchd: /Library/LaunchDaemons/com.***.promtail.plist Executable: /opt/promtail/bin/promtail

Details: Restrictive config permissions - possibly malware

Launchd: /Library/LaunchDaemons/com.***.node-exporter.plist Executable: /opt/node-exporter/bin/node_exporter

Details: Restrictive config permissions - possibly malware

Now, it is possible that these are legitimate, if this is something that you know to have installed; are you familiar with these? By a cursory search, they seem to do some form of rather low level system reporting, and appear to be more tailored to Linux. Granted, I may be completely missing the point, but maybe these are involved in whatever causes the panic?

There is also a mention of some framework related to Virtualization that is using a high percentage of CPU. I don't know what this is, or if it is related to any of the above, but you may have an idea.

My solution: My late 2012 mini, running Catalina, appeared to be overheating and repeatedly rebooted. I simply Installed and ran a fan control app at full blast. Also elevated the mini about 1/2 “ on its center plastic stand… this enhanced the air flow. Seems to fix it.