The new enchantments are not listed in the creative tab for weapons but can be found via the searchbar.
Crossbow enchantment books don't have a creative tab
Multishot, Quick Charge and Piercing books aren't found in Combat tab of Creative inventory
Crossbow-Exclusive Enchantments' Enchanted Books Do Not Have A Creative Inventory Tab
Crossbow Enchantment Books Not in Creative Inventory
I have loaded the snapshot for my first time and can't find; The Crossbow Enchantments or the suspicious stew. I'm not sure if this is a bug or not but it is an issue
crossbow enchantments not listed in inventory