Enchantment glint can be seen from too far away and even through nether fog

A player can see the enchantment glint of an item a mob is holding from too far away, even if the player cannot see the mob itself.

 

(In this case there is a Piglin with an enchanted crossbow)

*Disclaimer: I do not know if this affects armor, other mobs, or other items, or can be seen in other biomes, or affects earlier versions