Custom Enchantment In A Villager Trade

Hello,
I have a question that really changes my mod!
So, how can you make a villager trade a specific custom enchantment because I cant select the enchantment book with my enchantment, only this item called "Enchanted Book" without any enchantment and this feature would really change my mod!
In general I think you should be able to pick these different books and potions for recipes or trades!

The Mod Version is 1.19.4

Here is a example picture of what i meant:
Link (if picture doesnt load): https://ibb.co/LgKZXmn

I would be nice if someone could explain it very detailed or show pictures of the procedure so I can understand everything easier!
Thanks!