Commands 1.21.11 Problem Found

[UltimateX_]

the problem was that mojang changed how to write those commands
here a true version of Sharpness 255 Sword
/give @p minecraft:netherite_sword[enchantments={sharpness:255}]
if you like to add more than 1 enchant use this
/give @p minecraft:netherite_sword[enchantments={sharpness:255,mending:255}]
you can edit command like you want i guess i helped enough