Hello A.asswad
I will like to know if you want to monitor the output of the NMAP command or if you want to monitor if any user on the system executes the given command.
If you want to monitor the output of the command, you need to use the command option. More information can be found in this section of the documentation.
On the other hand, you can use the Linux Audit system to monitor command execution. There is a section on the documentation explaining how to set up Wazuh. Additionally, I will leave several useful links: