Minecraft offers the option to add your own server icon, which is displayed in multiplayer in front of the server, provided the server has been saved.
Add the icon
To add the icon, FTP rights and the icon itself are required.
Important: The icon must be 64x64 pixels in size and bear the name server-icon.png.
First, a connection is established via FTP to the game server, how exactly that works can be seen here: https://docs.zap-hosting.com/docs/en/gameserver_ftpaccess/
As soon as the connection is established, you can see the server data such as:
The icon must now be uploaded to the main directory, it must not be uploaded to any subdirectory:
Once this has been done, the server must now be started / restarted using the control buttons in the web interface at the top right of the respective server:
Checking the icon
If the name and size have now been matched, it is displayed in multiplayer in front of the server:
The icon can also be exchanged or deleted at any time in this way.