Suricata doesn't detect nmap scan

Hi guys,
I have a problem: I have installed Suricata on my server and set the Emergency Threats Open rules, and I am trying to perform scans on this server using nmap, even in aggressive mode with the -A option, but Suricata does not detect them. Is this normal? Could there be another specific set of rules to detect this type of nmap scans? Or did I do something wrong? I should mention that if I try to reinstall the rules, the system informs me that they are already installed, and anyway, if I perform get operations with the curl command, it detects those.

Thank you for reply.

Did you check if you enabled signatures related to scans?
In general simple scans are not considered a relevant security risk, so not a big focus on detecting them.