Preheat the oven to 400 degrees Fahrenheit. Spray a 2 ½ quart or similar sized baking dish with cooking spray or grease with vegan butter.
In a large bowl, add melted butter, water, maple syrup, lemon juice, ground cinnamon, organic cane sugar, 1 tablespoon white rice flour, vanilla extract, and salt. Whisk to combine.
Add the sliced apples to the bowl. Stir to coat. Transfer apples and remaining liquid into prepared baking dish. Bake for 20 minutes.
While the filling is baking, prepare the biscuits. Combine the white rice flour, oat flour, cane sugar, baking powder, and salt in a medium bowl. Whisk until ingredients are evenly incorporated.
Add a ½ cup almond milk and the olive oil to the dry ingredients. Stir for 2-3 minutes; the mixture should start to thicken. Place the bowl in the refrigerator and allow to chill for at least 10 minutes or until ready to top filling.
When the apple filling is ready, remove it from the oven and stir the apples. Use a heaping tablespoon to drop 6-7 rounds of biscuit dough on top of filling. I like to loosely shape it into rounds with my hands and carefully place it on top of the filling. This will not completely cover the filling.
Using a pastry brush, use the remaining 3 tablespoons almond milk and brush the tops and edges of the biscuits with it. Then sprinkle with extra sugar (and whole oats if desired). Bake for 22-25 minutes or until the tops of biscuits start to turn a light golden brown and the apples are bubbling.
Allow the cobbler to sit for at least 5 minutes before serving. Serve warm with vanilla ice cream.