Begin by preheating the oven to 350. Line a baking pan with parchment paper or use baking spray to grease the pan.
In a large mixing bowl, mix the apple sauce, melted vegan butter, milk, sugar, vanilla, baking powder, baking soda, apple cider vinegar, salt, maple syrup, cinnamon, nutmeg, and cloves together. Once the combination is well mixed, add the flour and oats and mix until a silky batter is formed.
Pour the batter into the lined baking pan. Bake for 30 minutes or until the center has fully risen and the cake is golden on the edges.
If you used parchment paper, allow the cake to cool and then lift the paper and cake out of the pan gently. If you greased the pan, allow the cake to cool in the pan and then leave it in the pan.
Use an electric hand mixer to mix the vegan cream cheese, melted butter, powdered sugar, and cinnamon together to make the cinnamon cream cheese frosting. Frost the apple sheet cake and enjoy warm or cool.