RedJ21

Duck Buddy adds a small customizable duck companion. The duck follows players around the world, shows up for other players on Fabric servers when they also have the mod installed, and can be customized from the Minecraft options menu.

Better Tech is a Fabric tech mod for Minecraft 1.21.1 designed to eliminate over-complicated setups.

Best Buddys adds animated 3D companions to Minecraft. Choose a buddy, customize it with headwear and held items, and let it follow you through singleplayer, multiplayer, and servers that do not have the mod installed.