Not in the War Game from what I can remember. Due to the power difference in Familias he only crafted normal one as they were more power as they don't rely on the users' level.

Wish Omori would have Welf craft 3-4 different Element Daggers for Bell turning him into a Magic Blades User. Haruhime might gain one but if that's the case it will probably happen post DM20

Haruhime is only level two. Even if she uses an indestructible magic sword, it would just be a level 2 mage attack. Not really enough to defend herself.

Nah he didn't make them for the war game. I think it was more due to a time constraint than anything else. Mass producing normal magic blades was quicker. Or something like that. I could be wrong though.

What I'm really hoping for in future books is that now that Welf came make unbreakable magic swords is that he branches out into other magics. Since normal magic swords always break they're unreliable so it make sense to only use them for a few attack spells. If he can make ones that don't break he should be able to make ones that do different spells. Like defensive, recovery, buff/enchantment, etc. I can see Haruheme and Lilly getting defensive daggers or spears to protect themselves. Lilly's magic is useless in the dungeon, but if she could use it for a defensive spell via a dagger or something that would be a game changer. It could mean that the 2x weak and defenseless members 'could' keep themselves safe while the small hestia familia keep working their way deeper into the dungeon.

Also, think of Bell with Hestia Knife in one hand for attack and a defensive dagger in the other hand giving him a personal barrier any time he needed it during battle. That'd be a pretty powerful combo.