Egg Tab - Fabric
Egg Tab is a client-side Minecraft mod that organizes the creative inventory by creating two new specialized tabs. All mob spawn eggs are moved to a separate "Spawn Eggs" category, while enchanted books are placed in a special "Enchanted Books" panel.
The mod is fully customizable - each additional tab can be disabled according to user preference through the mod menu or configuration file. An important advantage is compatibility with other mods - Egg Tab automatically includes any additional spawn eggs added by third-party modifications in its sorting system.
Demonstration
The screenshot below shows how the spawn eggs tab appears in creative mode:
