Preheat your oven to 375°F and line an 8 x 8-inch baking dish with parchment paper.
Add the chopped strawberries, lemon juice, and maple syrup to a small saucepan over medium heat. Simmer for about 10 minutes, stirring occasionally, until the strawberries have softened.
Gently mash some of the strawberries while leaving a few larger pieces, if desired. Stir in the cornstarch and continue cooking for 2-3 minutes, until the mixture has thickened. Remove from the heat and let it cool slightly.
In a large bowl, combine the rolled oats, almond flour, cinnamon, sea salt, and baking powder. Stir to combine.
Add the melted butter, vanilla, and maple syrup to the dry ingredients. Mix until a crumbly dough forms.
Reserve about 1 cup of the dough for the topping. Press the remaining dough firmly into the bottom of the prepared baking dish to create an even crust.
Spread the strawberry filling evenly over the crust, then crumble the reserved dough over the top.
Bake for 25-30 minutes, or until the topping is lightly golden brown.
Allow the bars to cool completely before slicing. They'll continue to set as they cool, making them much easier to cut.
To make the glaze, whisk together the melted coconut milk and confectioners sweetener until smooth. Drizzle over the cooled bars before serving.