My server is not listed

Good afternoon friends. I recently made a server on a remote machine and for some reason it is not in the server list. I can connect to it safely, although it is not on my computer. That is, I do not connect locally. However, my friends cannot connect by ip through the console or through the search, there is simply no server.

did you open and forward the required ports on your router ?

connect to your server via this tool

https://www.yougetsignal.com/tools/open-ports/

if the tool cant see your server then nor will your friends steam or anyone else...