In a saucepan, combine hearts of palm rice, almond milk, 1 tablespoon vanilla extract, maple syrup, and 2 tablespoons cocoa powder. Bring to a boil, then reduce heat and simmer for 5 minutes. Stir in chia seeds and cook for an additional 5 minutes, or until thickened. Season with salt.
In a separate saucepan, combine coconut milk, 1 tablespoon vanilla extract, honey, and remaining cocoa powder. Cook over medium heat until heated through and slightly thickened.
To serve, layer the rice pudding in bowls, top with chocolate sauce, and garnish with strawberries, blueberries, and coconut.