commands tested in 1.19.2, designed for use without command blocks
Tools
Knockback Stick/give @s stick{Enchantments:[{id:"minecraft:knockback",lvl:1000}]} 1
OP Netherite Sword/give @s netherite_sword{Unbreakable:1,Enchantments:[{id:bane_of_arthropods,lvl:99},{id:fire_aspect,lvl:99},{id:knockback,lvl:99},{id:looting,lvl:99},{id:sharpness,lvl:99},{id:silk_touch,lvl:1},{id:smite,lvl:99},{id:sweeping,lvl:99}]} 1
OP Netherite Pickaxe/give @s netherite_pickaxe{Unbreakable:1,display:{Name:'[{"text":"dig thingy","italic":false}]'},Enchantments:[{id:efficiency,lvl:99},{id:fortune,lvl:99}]} 1
OP Netherite Axe/give @s netherite_axe{Unbreakable:1,display:{Name:'[{"text":"funny axe","italic":false}]'},Enchantments:[{id:bane_of_arthropods,lvl:99},{id:efficiency,lvl:99},{id:fortune,lvl:99},{id:sharpness,lvl:99},{id:smite,lvl:99}]} 1
OP Netherite Shovel/give @s netherite_shovel{Unbreakable:1,display:{Name:'[{"text":"dirt","italic":false}]'},Enchantments:[{id:efficiency,lvl:99},{id:fortune,lvl:99},{id:sharpness,lvl:99}]} 1
OP Netherite Hoeno. just no.
Armor
OP Netherite Helmet/give @s netherite_helmet{Unbreakable:1,Enchantments:[{id:aqua_affinity,lvl:99},{id:blast_protection,lvl:99},{id:fire_protection,lvl:99},{id:projectile_protection,lvl:99},{id:protection,lvl:99},{id:respiration,lvl:99},{id:thorns,lvl:99}]} 1
OP Netherite Chestplate/give @s netherite_chestplate{Unbreakable:1,display:{Name:'[{"text":"boobs","italic":false}]'},Enchantments:[{id:blast_protection,lvl:99},{id:fire_protection,lvl:99},{id:projectile_protection,lvl:99},{id:protection,lvl:99},{id:thorns,lvl:99}]} 1
OP Netherite Leggings/give @s netherite_leggings{Unbreakable:1,Enchantments:[{id:blast_protection,lvl:99},{id:fire_protection,lvl:99},{id:projectile_protection,lvl:99},{id:protection,lvl:99},{id:swift_sneak,lvl:99},{id:thorns,lvl:99}]} 1
OP Netherite Feet/give @s netherite_boots{Unbreakable:1,Enchantments:[{id:blast_protection,lvl:99},{id:feather_falling,lvl:99},{id:fire_protection,lvl:99},{id:projectile_protection,lvl:99},{id:protection,lvl:99},{id:soul_speed,lvl:99},{id:thorns,lvl:99}]} 1
Bows
OP Crossbow/give @s crossbow{Unbreakable:1,display:{Name:'[{"text":"firearm","italic":false}]',Lore:['[{"text":"walmat","italic":false}]']},Enchantments:[{id:multishot,lvl:1},{id:piercing,lvl:99},{id:quick_charge,lvl:3}]} 1
OP Arrows/give @s tipped_arrow{display:{Name:'[{"text":"bullet","italic":false}]',Lore:['[{"text":"30mm","italic":false}]']},CustomPotionEffects:[{Id:7,Duration:99,Amplifier:99},{Id:2,Duration:99,Amplifier:99},{Id:20,Duration:99,Amplifier:99}]} 64
OP Fireworks/give @s firework_rocket{Fireworks:{Explosions:[{Type:1},{Type:1},{Type:1},{Colors:[I;11743532,15435844,14602026,6719955],Type:1}]},display:{Name:'[{"text":"explosive","italic":false}]',Lore:['[{"text":"check your mailbox uwu","italic":false}]']}} 64
