You said she did not command men- this one instance (and there are others) prove that she did led an army. She rallied the men single handily, choice their objective, and attacked with them. Given that the only other captain in the battle rallied and answered to her the only other alternative is to say the men had no leader at all, which is far more ridiculous. To say that is 'leading 0 men' is, well, factually incorrect. She was a commander, both in the CK2 sense and in actual historical terms. This one exception probably isn't enough for Paradox to actually put female commanders in the game (particularly if it the coding is difficult), but if isn't that difficult they should at least have an event covering the option (and more importantly let mods use it as a tool).
Please note that I'm not saying that she commanded the entire French army, or that France's eventual victory can be attributed solely to her. They can't. France had so many advantages over the English that all they needed was decent leadership to see them to victory. But to discount her actual commanding role is simply being too harsh on the poor woman.