Port 8000 is closed when starting mysql

Hi everyone, I followed the community guide to set up a mysql server on my raspberry pi 3, when I run the nmap commands, the port 8000 is not listed as the example shows. I tried iptables but it didn’t work, and I looked in the /etc/services file and didn’t the port listed. Is there any way I can fix this issue? I’m new to linux and it would be great if you could explain what’s wrong in more simple words.