Preheat oven to 350°F (175°C) and line a 12-cup muffin tin with paper liners or apply non-stick cooking spray.
In a large mixing bowl, whisk together the oat flour, vanilla protein powder, baking powder, baking soda, and salt.
In a separate medium bowl, whisk together the Greek yogurt, eggs, maple syrup, and vanilla extract until smooth.
Pour the wet ingredients into the dry ingredients and stir with a spatula until just combined.
Gently fold the diced strawberries into the batter, ensuring even distribution without overworking the dough.
Divide the batter evenly among the 12 muffin cups, filling each about three-quarters full.
Bake for 18 to 22 minutes or until the tops are golden and a toothpick inserted into the center comes out clean.
Cool the muffins in the tin for 5 minutes before transferring them to a wire rack to cool completely.