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