Combine flour, baking powder, baking soda, and salt in a medium bowl. Set aside.
In a large bowl, beat the egg, yolk, and sugar with an electric mixer on medium speed, about 2 minutes.
Mix in the oil, vanilla, and orange zest.
Mix in the Greek yogurt.
Mix in the flour mixture until fully incorporated.
Divide into 12 cupcake tins; bake at 350 degrees for 18-20 minutes.
Remove from oven and cool completely.
Once cupcakes are completely cooled, use a cupcake corer to remove a small piece of cake from the top of each. Fill with orange curd.
Decorate with strawberry buttercream frosting.
Just before serving, top with orange and strawberry wedges.