How can I put emojis in server name?

I pasted emojis in server cfg but always change to question mark, I really dont know how to fix that.

Make sure you save the file in the right encoding e.g. utf-8

Open your server.cfg file with Notepad++, Atom, or Visual Studio Code (I use Notepad++ just because it’s fairly basic and easy to use for me). To insert the emojis with Notepad++ you have to change the encoding after opening the file:

263-289-max

After both are set, the sv_hostname parameter can be set:

498-96-max

Now it should save properly as an emoji in your server name.

when I open Notepad++ again, emoji changes to simbols, is that normal?