Choose which modules should be randomised for the world through three main categories: Worldgen Modules, General Modules, and Client Modules. You can access the module configurations during world creation or in-game via the designated keybind (g) to open the Randomiser GUI.
/locate command will be unreliable with this enabled./trulyrandom Player will configure the Minecraft modules for Player, allowing for per-player item/block model randomisation.