Using anti-matter for weapons isn't that much of a benefit over a nuclear bomb other than potentially the bombs volume. You would get much less explosion per dollar versus nuclear, and our largest nuclear bombs already waste most of their energy blowing it right out into space. Its like throwing bombs at an antfarm, yeah a full stick of dynamite would completely obliterate the ant farm, but so would a quarter stick of dynamite, and throwing 100 sticks of dynamite at an ant farm may boast impressive energy levels on paper but would be a complete waste of dynamite and effort because you already destroyed it 1,000 times over.
Unless we'd be fighting literal alines in space, and need a weapon for them, I think this would be many many many orders of magnitude too expensive / tricky for earth use. We have plenty of non sci-fi big boom sticks already as it is...
The comic Yoko Tsuno: The time spiral from 1981 (https://fr.wikipedia.org/wiki/La_Spirale_du_temps) is about a time traveler, who arrives from the future to prevent the creation/invention of antimatter. This is important, because in a future world war an antimatter bomb destroyed the earth.
The fact that no time traveler is mentioned in the article is probably a good sign for our future.