Link: https://docs.papermc.io/paper/anti-xray
Help: https://discord.gg/papermc
Anti-Xray can be configured per world in the paper.yml configuration file. To understand how per world configuration works please read this first. Note that after changing any settings for Anti-Xray you have to restart your server. Executing the /reload command (you should never do this) won't apply the settings to worlds that are already loaded.