Preheat oven to 400℉. Grease a muffin tin.
In a medium mixing bowl, add the oats, flours, salt, baking powder and soda, cinnamon, and allspice. Mix until combined. Set aside.
In a large mixing bowl, combine the eggs, maple syrup, oat milk, coconut oil and vanilla extract and mix well, Stir the dry ingredients into the wet and stir until just combined. Set the batter aside and let it rest for 5-10 minutes.
While the batter rest, make the pecan crumble by adding the pecans to a food processor. Blend until the pecans have become fine crumbs. Pour the pecans into a small bowl with the butter, cinnamon, brown sugar and salt. Mix until well combined.
After the batter has rested, fold in the diced pears. Divide the batter into the 12 muffin tins. Sprinkle the pecan crumble on top of each muffin.
Bake for 14-16 minutes or until a tooth pick comes out clean. Once done, let the muffins cool in the muffin tin. Store in a air tight container for at room temperature for about 3 days or in the refrigerator for up to 5 days.