I have not seen a definition of carport issued by FEMA. However, if it does not have at least two rigid walls and a roof, it isn't an insurable structure. So an open-sided carport would be excluded, while a carport such as you have (assuming it has a roof with the three rigid walls) sounds like it is insurable.
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I hear and I forget. I see and I remember. I do and I understand.--Confucius