Add the cottage cheese, eggs, milk, vanilla extract, maple syrup, cocoa powder, and beet powder to a blender. Blend until completely smooth.
Whisk the oat flour, protein powder, baking powder, baking soda, and salt in a large bowl.
Pour the blended cottage cheese mixture into the dry ingredients. Stir in the apple cider vinegar just until a thick batter forms, then rest the batter for 5 minutes.
Heat a lightly buttered nonstick skillet over medium-low heat. Cook 1/4 cup portions of batter for 2 to 3 minutes, until bubbles form and the edges look set.
Flip the pancakes and cook for 1 to 2 minutes more. Repeat with the remaining batter, adding a little more butter as needed.
Whisk the cream cheese, Greek yogurt, maple syrup, and milk until smooth and pourable.
Stack the warm red velvet pancakes and drizzle them with the cream cheese mixture before serving.