If you are a map maker or server admin, you can create these "OP" moments using:
"OP" (Overpowered) loot typically includes items that bypass standard survival progression. This can range from "God Apples" (Enchanted Golden Apples) and high-level enchanted gear to rare utility items found in end-game structures. Op Chest Loot!!!
Shulker shells and Diamond gear with high-level enchantments (e.g., Mending, Protection IV). If you are a map maker or server
Tools like Recurrent Complex allow you to fill an inventory with items and generate a randomized loot table automatically. Op Chest Loot!!!