I found out that it's possible to check whether a player is online & vanished on the server.
To check if a player is online & vanished, players can use the "/token send %username% 1" command - if the vanished player is online, he will receive the tokens.
I found out that it's possible to check whether a player is online & vanished on the server. To check if a player is online & vanished, players can use the "/token send %username% 1" command - if the vanished player is online, he will receive the tokens.