There are multiple advancements that are linked to the trident,

*Do a barrel roll! This achievement is obtained by using riptide to travel any distance

*A throwaway joke! This is obtained by throwing a trident

*Very very frightening! This is achieved by striking a villager with lightning using the channeling enchantment

*Not today, thank you. This is obtained by deflecting any projectile (including a trident) with a shield

*Sniper duel! This is achieved by killing a skeleton with any projectile (also including a trident) from 50 meters or more