Preheat the oven to 400°F.
Line a baking sheet with parchment paper and set it aside.
In the bowl of a stand mixer fitted with the paddle attachment, combine the all-purpose flour, sugar, baking powder, kosher salt, and orange zest.
Mix briefly until evenly combined.
Add the grated cold butter to the flour mixture.
Toss the butter with a fork to coat it lightly in the flour mixture.
Mix on medium-low speed until the texture resembles coarse cornmeal and the butter pieces are no larger than small peas.
In a separate bowl, whisk together the lightly beaten egg and cold heavy cream.
Pour the egg and cream mixture into the flour mixture.
Mix on low speed until the dough is just combined.
Add the diced strawberries.
Mix gently until the strawberries are evenly distributed throughout the dough. Avoid overmixing.
Transfer the dough to a lightly floured countertop.
Gently shape the dough into an 8-inch circle.
Using a sharp knife or pizza wheel, cut the dough into 8 wedges.
Place the wedges on the prepared baking sheet, leaving space between each piece.
In a small bowl, whisk together the remaining beaten egg and milk.
Brush the tops of the scones with the egg wash.
Bake for 20 to 25 minutes, or until the tops are lightly browned and the scones are cooked through.
Remove the scones from the oven.
Transfer them to a wire rack and allow them to cool for approximately 15 minutes.
While the scones are cooling, prepare the glaze.
In a small bowl, mix the confectioners’ sugar and freshly squeezed orange juice until smooth.
Once the scones have cooled slightly, drizzle the orange glaze over each scone.
Allow the glaze to set before serving.