Customizable Achievements / Implementing Advancements

Achievements should be more customizable like adding more achievement and achieving user-made challenges. These achievement don't need to have reward points, at least make it so players can have something that they want to prioritize. If achievements are too hard, you can even implement advancements to Bedrock! It will be specific per world, and more customizable. You can even add a new button in the player list where you can see another player's advancements.