That is not country level put of the same reason that
ice cream (or a person that ate ice cream) isn't country level.
Attack potency is the amount of energy a character releases in a single attack over a short period of time. (the short period of time is required because if I let my laser run for 10 million years it would also be able to vaporize the mount everest...)
During world war II the german army also destroyed countrys. Doesn't mean that the german army can together produce a country level attack though.
Or using nukes the US can destroy a country in second. Each nuke is still just city level...
Also some countrys are laughably small. Some of them just qualify as large city level.