Seems most other weapons from this mod are appearing but these 2 (as far as I've noticed anyway) are not. Not sure if they just don't appear there for a reason or what but I can't find verglas anywhere to verify. The mod is completely up to date.

Edit- I realize I said verglas like it's a weapon but I know it's a material

That's odd. Try deleting the soulsweapons.json config file and run minecraft to generate a new one. I'll look into it and see if something else causes this.

Issue resolved, added the recipe advancements so recipes should appear from now on.