She and the rest of the Konoha genin are not in the war, because they are too young. Usually age doesn't matter in the shinobi world, but for some reason during this war it does. Some of the fodder shinobi in that war look like all they know how to do is throw a kunai and the majority haven't even done anything besides stand around for 90% of it. I'm sure that Konohamaru and Hanabi would do a better job then them. I also doubt that Hanabi>Hinata at this point, it would be safe to make the assumption that Hinata has surpassed her.
Also there was a filler that stated the genin were too young to go to war, but that was a filler and not canon so...
but I'm still going to count it because that it the only logical answer as to why not a single genin from Konoha isn't there.
Also there was a filler that stated the genin were too young to go to war, but that was a filler and not canon so...
but I'm still going to count it because that it the only logical answer as to why not a single genin from Konoha isn't there.

