https://www.curseforge.com/minecraft/mc-mods/lendercataclysm

Cataclysm adds a few more toolset tiers, and it’d be nice to have knives for all these

Have you tried L_Ender 's Cataclysm Delight? It seems to add new knives.

I've seen it but it seems kinda low quality (and potentially MCreator?) and I think it'd be best to add the knives to Delightful as well for consistency so multiple mods don't need to be downloaded