Minecraft wiki entry for Enchanting_mechanics, associated text: Some enchantments are "treasure enchantments" (shown in the table below), meaning they can never be created by an enchanting table, and can be discovered only in certain situations: when generating chest loot (equipment and books), when fishing, when generating enchanted book trades, when bartering, and when an enchanted book is dropped by a raiding illager.‌[Bedrock Edition only]