What is the reason that replicated prefab copies are not displaying in the Game view until the previous copy has been successfully created?

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This is because Unity's Instantiate function (used to create copies of prefabs) is a synchronous operation, which means it needs to wait for the new object to be fully created before moving on to the next one. This ensures that the new object is properly initialized and ready to be displayed in the game view. If multiple copies were created simultaneously, it could cause performance issues and potential errors in the game.