What Should Be Added or Changed?

Adding the tag #minecraft:pickaxes to Paxels to support a wider variety of enchantments. They do not have that as of now.

Why Should This Be Done?

The Paxels will support a wider variety of enchantments from other mods.

No enchantments are missing, they receive the same enchantments as vanilla pickaxes. Can you provide more information, like the mod version?