In a bowl, whisk together chia seeds, soy milk, plant-based yogurt, minced date, vanilla extract, cinnamon, cardamom, salt, and optional miso paste. Let it rest for 5-10 minutes before refrigerating for at least 4 hours or overnight.
For the apple topping, sauté diced apples with apple butter and maple syrup in a skillet over medium heat until tender (7-15 minutes). Let cool.
Mix rolled oats with chopped nuts and minced dates to create the crumble. Toast in a skillet or bake until golden brown (5-15 minutes).
Assemble by layering the chilled chia pudding with the spiced apple topping and sprinkle with oat crumble before serving.