Using the Melius Vanish Mod
Going Invisible and Undetectable
Melius Vanish Mod lets you become fully invisible and undetectable on a Minecraft server. While vanished, other players cannot see or hear you, and your actions leave no trace.
Opening or closing containers such as chests, barrels, ender chests, and shulker boxes produces no animation. Placing blocks, breaking blocks, and walking are all silent. You are also removed from command selectors like /msg and /gamemode, dropped from the /list command, and hidden from the server list player sample and player count. Join, leave, death, and advancement messages are suppressed as well.
Beyond hiding, the mod lets you inspect other players' inventories, making it useful for monitoring or moderating a server without being noticed. Everything happens through the Vanish feature, so once you are vanished, these effects apply automatically without extra setup.